Drop extra BuildRelevance enums.

BUG=chromium:1034529
TEST=generate.sh

Cq-Depend: chromium:2171567, chromium:2172717
Change-Id: Id5e0b7ea5b6fc7c2762fac872ff5851f5e3b9385
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2173698
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
Tested-by: LaMont Jones <lamontjones@chromium.org>
Reviewed-by: David Burger <dburger@chromium.org>
diff --git a/go/chromite/api/toolchain.pb.go b/go/chromite/api/toolchain.pb.go
index 339483d..1df86fa 100644
--- a/go/chromite/api/toolchain.pb.go
+++ b/go/chromite/api/toolchain.pb.go
@@ -67,44 +67,6 @@
 	return fileDescriptor_7ff43bdb7436d394, []int{0}
 }
 
-// Does this artifact require a build?
-// TODO(crbug/1034529): Once the users of this enum have moved to using
-// artifacts.PrepareForBuildResponse.${NAME}, remove this enum.
-type PrepareForToolchainBuildResponse_OldBuildRelevance int32
-
-const (
-	PrepareForToolchainBuildResponse_UNSPECIFIED PrepareForToolchainBuildResponse_OldBuildRelevance = 0
-	// Build is necessary to generate artifacts.
-	PrepareForToolchainBuildResponse_NEEDED PrepareForToolchainBuildResponse_OldBuildRelevance = 1
-	// Defer to other artifacts.  Used primarily for aggregation of artifact
-	// results.
-	PrepareForToolchainBuildResponse_UNKNOWN PrepareForToolchainBuildResponse_OldBuildRelevance = 2
-	// Artifacts are already generated.  The build is pointless.
-	PrepareForToolchainBuildResponse_POINTLESS PrepareForToolchainBuildResponse_OldBuildRelevance = 3
-)
-
-var PrepareForToolchainBuildResponse_OldBuildRelevance_name = map[int32]string{
-	0: "UNSPECIFIED",
-	1: "NEEDED",
-	2: "UNKNOWN",
-	3: "POINTLESS",
-}
-
-var PrepareForToolchainBuildResponse_OldBuildRelevance_value = map[string]int32{
-	"UNSPECIFIED": 0,
-	"NEEDED":      1,
-	"UNKNOWN":     2,
-	"POINTLESS":   3,
-}
-
-func (x PrepareForToolchainBuildResponse_OldBuildRelevance) String() string {
-	return proto.EnumName(PrepareForToolchainBuildResponse_OldBuildRelevance_name, int32(x))
-}
-
-func (PrepareForToolchainBuildResponse_OldBuildRelevance) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_7ff43bdb7436d394, []int{2, 0}
-}
-
 // Information about a collection of artifacts.
 type ArtifactInfo struct {
 	// The ArtifactType.
@@ -244,9 +206,8 @@
 	return nil
 }
 
-// TODO(crbug/1019868): Migrate to using chromiumos.PrepareForBuildResponse.
 type PrepareForToolchainBuildResponse struct {
-	// See artifacts.proto in this directory.
+	// Does this artifact require a build?  See artifacts.proto in this directory.
 	BuildRelevance       PrepareForBuildResponse_BuildRelevance `protobuf:"varint,1,opt,name=build_relevance,json=buildRelevance,proto3,enum=chromite.api.PrepareForBuildResponse_BuildRelevance" json:"build_relevance,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                               `json:"-"`
 	XXX_unrecognized     []byte                                 `json:"-"`
@@ -502,7 +463,6 @@
 
 func init() {
 	proto.RegisterEnum("chromite.api.AFDOArtifactType", AFDOArtifactType_name, AFDOArtifactType_value)
-	proto.RegisterEnum("chromite.api.PrepareForToolchainBuildResponse_OldBuildRelevance", PrepareForToolchainBuildResponse_OldBuildRelevance_name, PrepareForToolchainBuildResponse_OldBuildRelevance_value)
 	proto.RegisterType((*ArtifactInfo)(nil), "chromite.api.ArtifactInfo")
 	proto.RegisterType((*PrepareForToolchainBuildRequest)(nil), "chromite.api.PrepareForToolchainBuildRequest")
 	proto.RegisterType((*PrepareForToolchainBuildResponse)(nil), "chromite.api.PrepareForToolchainBuildResponse")
@@ -515,62 +475,59 @@
 func init() { proto.RegisterFile("chromite/api/toolchain.proto", fileDescriptor_7ff43bdb7436d394) }
 
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+	0x3e, 0xf1, 0xd0, 0xc8, 0x7b, 0xaa, 0x0f, 0x6a, 0xc9, 0xc1, 0xe9, 0x63, 0x34, 0x7e, 0xe6, 0xe9,
+	0x83, 0xbd, 0x93, 0x3f, 0x6b, 0xc0, 0xca, 0xb5, 0x79, 0x4e, 0xf8, 0x2b, 0x3a, 0x23, 0xf0, 0x67,
+	0x70, 0xef, 0x45, 0x1c, 0x60, 0x49, 0x3c, 0x45, 0xc6, 0x37, 0x54, 0x5e, 0x57, 0xd0, 0xc3, 0xe3,
+	0xaa, 0x46, 0xb7, 0xb3, 0x6f, 0xdf, 0xdf, 0x21, 0x52, 0x53, 0xd1, 0xaf, 0xbf, 0x7e, 0x63, 0x9b,
+	0x96, 0x01, 0x7f, 0x02, 0x1f, 0xbe, 0x88, 0x17, 0x0c, 0x07, 0x57, 0x44, 0x4a, 0x12, 0xfc, 0x8f,
+	0x9d, 0x63, 0xd0, 0xd9, 0xf8, 0x44, 0xe0, 0xa7, 0xb7, 0xed, 0xa3, 0xad, 0xff, 0x55, 0xb6, 0xb3,
+	0x6b, 0x78, 0x2a, 0xff, 0x4b, 0xd0, 0xd1, 0xdf, 0x47, 0x71, 0xc3, 0x8f, 0xab, 0x25, 0xb6, 0xaf,
+	0x31, 0xfb, 0x93, 0xbf, 0x89, 0xd2, 0xf5, 0xed, 0xf7, 0x5f, 0xbf, 0xb1, 0xf7, 0x41, 0x23, 0x7f,
+	0xb5, 0x58, 0xe6, 0xf0, 0xcb, 0xef, 0xbf, 0x98, 0xb3, 0x7c, 0x80, 0x1d, 0xc6, 0xe7, 0x83, 0xd2,
+	0xe3, 0x81, 0x46, 0x21, 0xc7, 0x03, 0xf5, 0x76, 0x18, 0xcc, 0xd9, 0xa0, 0xfc, 0x26, 0x99, 0xd6,
+	0xd5, 0xf1, 0xe7, 0x7f, 0x05, 0x00, 0x00, 0xff, 0xff, 0xfd, 0xdc, 0x1e, 0x07, 0x12, 0x09, 0x00,
+	0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/go/chromiumos/common.pb.go b/go/chromiumos/common.pb.go
index 5b391e4..f990439 100644
--- a/go/chromiumos/common.pb.go
+++ b/go/chromiumos/common.pb.go
@@ -218,42 +218,6 @@
 	return fileDescriptor_fa0b57c3d7d4c63b, []int{6, 0}
 }
 
-// DEPRECTATED: Does this artifact require a build?
-type PrepareForBuildResponse_BuildRelevance int32
-
-const (
-	PrepareForBuildResponse_UNSPECIFIED PrepareForBuildResponse_BuildRelevance = 0
-	// Build is necessary to generate artifacts.
-	PrepareForBuildResponse_NEEDED PrepareForBuildResponse_BuildRelevance = 1
-	// Defer to other artifacts.  Used primarily for aggregation of artifact
-	// results.
-	PrepareForBuildResponse_UNKNOWN PrepareForBuildResponse_BuildRelevance = 2
-	// Artifacts are already generated.  The build is pointless.
-	PrepareForBuildResponse_POINTLESS PrepareForBuildResponse_BuildRelevance = 3
-)
-
-var PrepareForBuildResponse_BuildRelevance_name = map[int32]string{
-	0: "UNSPECIFIED",
-	1: "NEEDED",
-	2: "UNKNOWN",
-	3: "POINTLESS",
-}
-
-var PrepareForBuildResponse_BuildRelevance_value = map[string]int32{
-	"UNSPECIFIED": 0,
-	"NEEDED":      1,
-	"UNKNOWN":     2,
-	"POINTLESS":   3,
-}
-
-func (x PrepareForBuildResponse_BuildRelevance) String() string {
-	return proto.EnumName(PrepareForBuildResponse_BuildRelevance_name, int32(x))
-}
-
-func (PrepareForBuildResponse_BuildRelevance) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{13, 0}
-}
-
 // Legacy artifacts, handled in cros_artifacts.  DO NOT ADD TO THIS.
 type ArtifactsByService_Legacy_ArtifactType int32
 
@@ -324,7 +288,7 @@
 }
 
 func (ArtifactsByService_Legacy_ArtifactType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 0, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 0, 0}
 }
 
 // Artifacts which the ArtifactsService endpoints pass to ToolchainService.
@@ -400,7 +364,7 @@
 }
 
 func (ArtifactsByService_Toolchain_ArtifactType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 1, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 1, 0}
 }
 
 // Artifacts which the ArtifactsService endpoints pass to ImageService.
@@ -423,7 +387,7 @@
 }
 
 func (ArtifactsByService_Image_ArtifactType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 2, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 2, 0}
 }
 
 // Artifacts which the ArtifactsService endpoints pass to PackageService.
@@ -446,7 +410,7 @@
 }
 
 func (ArtifactsByService_Package_ArtifactType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 3, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 3, 0}
 }
 
 // Artifacts which the ArtifactsService endpoints pass to SysrootService.
@@ -469,7 +433,7 @@
 }
 
 func (ArtifactsByService_Sysroot_ArtifactType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 4, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 4, 0}
 }
 
 // Artifacts which the ArtifactsService endpoints pass to TestService.
@@ -492,7 +456,7 @@
 }
 
 func (ArtifactsByService_Test_ArtifactType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 5, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 5, 0}
 }
 
 // BuildTarget encapsulates a number of related arguments. At the moment, the
@@ -1276,47 +1240,6 @@
 	return nil
 }
 
-// TODO(crbug/1034529): Remove this after migrating users to
-// chromite.api.artifacts.PrepareForBuildResponse.
-type PrepareForBuildResponse struct {
-	BuildRelevance       PrepareForBuildResponse_BuildRelevance `protobuf:"varint,1,opt,name=build_relevance,json=buildRelevance,proto3,enum=chromiumos.PrepareForBuildResponse_BuildRelevance" json:"build_relevance,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                               `json:"-"`
-	XXX_unrecognized     []byte                                 `json:"-"`
-	XXX_sizecache        int32                                  `json:"-"`
-}
-
-func (m *PrepareForBuildResponse) Reset()         { *m = PrepareForBuildResponse{} }
-func (m *PrepareForBuildResponse) String() string { return proto.CompactTextString(m) }
-func (*PrepareForBuildResponse) ProtoMessage()    {}
-func (*PrepareForBuildResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{13}
-}
-
-func (m *PrepareForBuildResponse) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_PrepareForBuildResponse.Unmarshal(m, b)
-}
-func (m *PrepareForBuildResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_PrepareForBuildResponse.Marshal(b, m, deterministic)
-}
-func (m *PrepareForBuildResponse) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_PrepareForBuildResponse.Merge(m, src)
-}
-func (m *PrepareForBuildResponse) XXX_Size() int {
-	return xxx_messageInfo_PrepareForBuildResponse.Size(m)
-}
-func (m *PrepareForBuildResponse) XXX_DiscardUnknown() {
-	xxx_messageInfo_PrepareForBuildResponse.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_PrepareForBuildResponse proto.InternalMessageInfo
-
-func (m *PrepareForBuildResponse) GetBuildRelevance() PrepareForBuildResponse_BuildRelevance {
-	if m != nil {
-		return m.BuildRelevance
-	}
-	return PrepareForBuildResponse_UNSPECIFIED
-}
-
 // Additional information about artifacts used by PrepareForBuild endpoints.
 // TODO(crbug/1019868): This is migrating to ArtifactProfileInfo.
 type PrepareForBuildAdditionalArgs struct {
@@ -1333,7 +1256,7 @@
 func (m *PrepareForBuildAdditionalArgs) String() string { return proto.CompactTextString(m) }
 func (*PrepareForBuildAdditionalArgs) ProtoMessage()    {}
 func (*PrepareForBuildAdditionalArgs) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{14}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{13}
 }
 
 func (m *PrepareForBuildAdditionalArgs) XXX_Unmarshal(b []byte) error {
@@ -1419,7 +1342,7 @@
 func (m *AfdoRelease) String() string { return proto.CompactTextString(m) }
 func (*AfdoRelease) ProtoMessage()    {}
 func (*AfdoRelease) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{15}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{14}
 }
 
 func (m *AfdoRelease) XXX_Unmarshal(b []byte) error {
@@ -1471,7 +1394,7 @@
 func (m *ArtifactProfileInfo) String() string { return proto.CompactTextString(m) }
 func (*ArtifactProfileInfo) ProtoMessage()    {}
 func (*ArtifactProfileInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{16}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{15}
 }
 
 func (m *ArtifactProfileInfo) XXX_Unmarshal(b []byte) error {
@@ -1572,7 +1495,7 @@
 func (m *ArtifactsByService) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService) ProtoMessage()    {}
 func (*ArtifactsByService) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16}
 }
 
 func (m *ArtifactsByService) XXX_Unmarshal(b []byte) error {
@@ -1658,7 +1581,7 @@
 func (m *ArtifactsByService_Legacy) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Legacy) ProtoMessage()    {}
 func (*ArtifactsByService_Legacy) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 0}
 }
 
 func (m *ArtifactsByService_Legacy) XXX_Unmarshal(b []byte) error {
@@ -1727,7 +1650,7 @@
 func (m *ArtifactsByService_Legacy_ArtifactInfo) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Legacy_ArtifactInfo) ProtoMessage()    {}
 func (*ArtifactsByService_Legacy_ArtifactInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 0, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 0, 0}
 }
 
 func (m *ArtifactsByService_Legacy_ArtifactInfo) XXX_Unmarshal(b []byte) error {
@@ -1783,7 +1706,7 @@
 func (m *ArtifactsByService_Toolchain) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Toolchain) ProtoMessage()    {}
 func (*ArtifactsByService_Toolchain) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 1}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 1}
 }
 
 func (m *ArtifactsByService_Toolchain) XXX_Unmarshal(b []byte) error {
@@ -1852,7 +1775,7 @@
 func (m *ArtifactsByService_Toolchain_ArtifactInfo) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Toolchain_ArtifactInfo) ProtoMessage()    {}
 func (*ArtifactsByService_Toolchain_ArtifactInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 1, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 1, 0}
 }
 
 func (m *ArtifactsByService_Toolchain_ArtifactInfo) XXX_Unmarshal(b []byte) error {
@@ -1901,7 +1824,7 @@
 func (m *ArtifactsByService_Image) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Image) ProtoMessage()    {}
 func (*ArtifactsByService_Image) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 2}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 2}
 }
 
 func (m *ArtifactsByService_Image) XXX_Unmarshal(b []byte) error {
@@ -1968,7 +1891,7 @@
 func (m *ArtifactsByService_Image_ArtifactInfo) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Image_ArtifactInfo) ProtoMessage()    {}
 func (*ArtifactsByService_Image_ArtifactInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 2, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 2, 0}
 }
 
 func (m *ArtifactsByService_Image_ArtifactInfo) XXX_Unmarshal(b []byte) error {
@@ -2017,7 +1940,7 @@
 func (m *ArtifactsByService_Package) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Package) ProtoMessage()    {}
 func (*ArtifactsByService_Package) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 3}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 3}
 }
 
 func (m *ArtifactsByService_Package) XXX_Unmarshal(b []byte) error {
@@ -2086,7 +2009,7 @@
 func (m *ArtifactsByService_Package_ArtifactInfo) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Package_ArtifactInfo) ProtoMessage()    {}
 func (*ArtifactsByService_Package_ArtifactInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 3, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 3, 0}
 }
 
 func (m *ArtifactsByService_Package_ArtifactInfo) XXX_Unmarshal(b []byte) error {
@@ -2135,7 +2058,7 @@
 func (m *ArtifactsByService_Sysroot) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Sysroot) ProtoMessage()    {}
 func (*ArtifactsByService_Sysroot) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 4}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 4}
 }
 
 func (m *ArtifactsByService_Sysroot) XXX_Unmarshal(b []byte) error {
@@ -2204,7 +2127,7 @@
 func (m *ArtifactsByService_Sysroot_ArtifactInfo) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Sysroot_ArtifactInfo) ProtoMessage()    {}
 func (*ArtifactsByService_Sysroot_ArtifactInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 4, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 4, 0}
 }
 
 func (m *ArtifactsByService_Sysroot_ArtifactInfo) XXX_Unmarshal(b []byte) error {
@@ -2253,7 +2176,7 @@
 func (m *ArtifactsByService_Test) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Test) ProtoMessage()    {}
 func (*ArtifactsByService_Test) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 5}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 5}
 }
 
 func (m *ArtifactsByService_Test) XXX_Unmarshal(b []byte) error {
@@ -2320,7 +2243,7 @@
 func (m *ArtifactsByService_Test_ArtifactInfo) String() string { return proto.CompactTextString(m) }
 func (*ArtifactsByService_Test_ArtifactInfo) ProtoMessage()    {}
 func (*ArtifactsByService_Test_ArtifactInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 5, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16, 5, 0}
 }
 
 func (m *ArtifactsByService_Test_ArtifactInfo) XXX_Unmarshal(b []byte) error {
@@ -2373,7 +2296,7 @@
 func (m *UploadedArtifactsByService) String() string { return proto.CompactTextString(m) }
 func (*UploadedArtifactsByService) ProtoMessage()    {}
 func (*UploadedArtifactsByService) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17}
 }
 
 func (m *UploadedArtifactsByService) XXX_Unmarshal(b []byte) error {
@@ -2450,7 +2373,7 @@
 func (m *UploadedArtifactsByService_Legacy) String() string { return proto.CompactTextString(m) }
 func (*UploadedArtifactsByService_Legacy) ProtoMessage()    {}
 func (*UploadedArtifactsByService_Legacy) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 0}
 }
 
 func (m *UploadedArtifactsByService_Legacy) XXX_Unmarshal(b []byte) error {
@@ -2496,7 +2419,7 @@
 }
 func (*UploadedArtifactsByService_Legacy_ArtifactPaths) ProtoMessage() {}
 func (*UploadedArtifactsByService_Legacy_ArtifactPaths) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 0, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 0, 0}
 }
 
 func (m *UploadedArtifactsByService_Legacy_ArtifactPaths) XXX_Unmarshal(b []byte) error {
@@ -2542,7 +2465,7 @@
 func (m *UploadedArtifactsByService_Toolchain) String() string { return proto.CompactTextString(m) }
 func (*UploadedArtifactsByService_Toolchain) ProtoMessage()    {}
 func (*UploadedArtifactsByService_Toolchain) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 1}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 1}
 }
 
 func (m *UploadedArtifactsByService_Toolchain) XXX_Unmarshal(b []byte) error {
@@ -2588,7 +2511,7 @@
 }
 func (*UploadedArtifactsByService_Toolchain_ArtifactPaths) ProtoMessage() {}
 func (*UploadedArtifactsByService_Toolchain_ArtifactPaths) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 1, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 1, 0}
 }
 
 func (m *UploadedArtifactsByService_Toolchain_ArtifactPaths) XXX_Unmarshal(b []byte) error {
@@ -2634,7 +2557,7 @@
 func (m *UploadedArtifactsByService_Image) String() string { return proto.CompactTextString(m) }
 func (*UploadedArtifactsByService_Image) ProtoMessage()    {}
 func (*UploadedArtifactsByService_Image) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 2}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 2}
 }
 
 func (m *UploadedArtifactsByService_Image) XXX_Unmarshal(b []byte) error {
@@ -2680,7 +2603,7 @@
 }
 func (*UploadedArtifactsByService_Image_ArtifactPaths) ProtoMessage() {}
 func (*UploadedArtifactsByService_Image_ArtifactPaths) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 2, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 2, 0}
 }
 
 func (m *UploadedArtifactsByService_Image_ArtifactPaths) XXX_Unmarshal(b []byte) error {
@@ -2726,7 +2649,7 @@
 func (m *UploadedArtifactsByService_Package) String() string { return proto.CompactTextString(m) }
 func (*UploadedArtifactsByService_Package) ProtoMessage()    {}
 func (*UploadedArtifactsByService_Package) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 3}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 3}
 }
 
 func (m *UploadedArtifactsByService_Package) XXX_Unmarshal(b []byte) error {
@@ -2772,7 +2695,7 @@
 }
 func (*UploadedArtifactsByService_Package_ArtifactPaths) ProtoMessage() {}
 func (*UploadedArtifactsByService_Package_ArtifactPaths) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 3, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 3, 0}
 }
 
 func (m *UploadedArtifactsByService_Package_ArtifactPaths) XXX_Unmarshal(b []byte) error {
@@ -2818,7 +2741,7 @@
 func (m *UploadedArtifactsByService_Sysroot) String() string { return proto.CompactTextString(m) }
 func (*UploadedArtifactsByService_Sysroot) ProtoMessage()    {}
 func (*UploadedArtifactsByService_Sysroot) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 4}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 4}
 }
 
 func (m *UploadedArtifactsByService_Sysroot) XXX_Unmarshal(b []byte) error {
@@ -2864,7 +2787,7 @@
 }
 func (*UploadedArtifactsByService_Sysroot_ArtifactPaths) ProtoMessage() {}
 func (*UploadedArtifactsByService_Sysroot_ArtifactPaths) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 4, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 4, 0}
 }
 
 func (m *UploadedArtifactsByService_Sysroot_ArtifactPaths) XXX_Unmarshal(b []byte) error {
@@ -2910,7 +2833,7 @@
 func (m *UploadedArtifactsByService_Test) String() string { return proto.CompactTextString(m) }
 func (*UploadedArtifactsByService_Test) ProtoMessage()    {}
 func (*UploadedArtifactsByService_Test) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 5}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 5}
 }
 
 func (m *UploadedArtifactsByService_Test) XXX_Unmarshal(b []byte) error {
@@ -2956,7 +2879,7 @@
 }
 func (*UploadedArtifactsByService_Test_ArtifactPaths) ProtoMessage() {}
 func (*UploadedArtifactsByService_Test_ArtifactPaths) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fa0b57c3d7d4c63b, []int{18, 5, 0}
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{17, 5, 0}
 }
 
 func (m *UploadedArtifactsByService_Test_ArtifactPaths) XXX_Unmarshal(b []byte) error {
@@ -2997,7 +2920,6 @@
 	proto.RegisterEnum("chromiumos.AFDOArtifactType", AFDOArtifactType_name, AFDOArtifactType_value)
 	proto.RegisterEnum("chromiumos.GomaConfig_GomaApproach", GomaConfig_GomaApproach_name, GomaConfig_GomaApproach_value)
 	proto.RegisterEnum("chromiumos.Path_Location", Path_Location_name, Path_Location_value)
-	proto.RegisterEnum("chromiumos.PrepareForBuildResponse_BuildRelevance", PrepareForBuildResponse_BuildRelevance_name, PrepareForBuildResponse_BuildRelevance_value)
 	proto.RegisterEnum("chromiumos.ArtifactsByService_Legacy_ArtifactType", ArtifactsByService_Legacy_ArtifactType_name, ArtifactsByService_Legacy_ArtifactType_value)
 	proto.RegisterEnum("chromiumos.ArtifactsByService_Toolchain_ArtifactType", ArtifactsByService_Toolchain_ArtifactType_name, ArtifactsByService_Toolchain_ArtifactType_value)
 	proto.RegisterEnum("chromiumos.ArtifactsByService_Image_ArtifactType", ArtifactsByService_Image_ArtifactType_name, ArtifactsByService_Image_ArtifactType_value)
@@ -3018,7 +2940,6 @@
 	proto.RegisterType((*GitilesCommit)(nil), "chromiumos.GitilesCommit")
 	proto.RegisterType((*UseFlag)(nil), "chromiumos.UseFlag")
 	proto.RegisterType((*ProtoBytes)(nil), "chromiumos.ProtoBytes")
-	proto.RegisterType((*PrepareForBuildResponse)(nil), "chromiumos.PrepareForBuildResponse")
 	proto.RegisterType((*PrepareForBuildAdditionalArgs)(nil), "chromiumos.PrepareForBuildAdditionalArgs")
 	proto.RegisterType((*AfdoRelease)(nil), "chromiumos.AfdoRelease")
 	proto.RegisterType((*ArtifactProfileInfo)(nil), "chromiumos.ArtifactProfileInfo")
@@ -3053,153 +2974,148 @@
 func init() { proto.RegisterFile("chromiumos/common.proto", fileDescriptor_fa0b57c3d7d4c63b) }
 
 var fileDescriptor_fa0b57c3d7d4c63b = []byte{
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+	0xfd, 0x69, 0xe8, 0x5d, 0x88, 0xb8, 0xc4, 0x71, 0xd9, 0xa1, 0x95, 0x9c, 0x3e, 0x2b, 0x17, 0xb9,
+	0x80, 0x38, 0x2e, 0x66, 0x13, 0x50, 0x1e, 0x52, 0xc1, 0x30, 0xb1, 0x33, 0x2d, 0x79, 0xf0, 0xfa,
+	0x22, 0x05, 0x81, 0xec, 0xc3, 0xc9, 0xd1, 0x64, 0x90, 0xfb, 0x6f, 0x04, 0xa2, 0x3c, 0x2e, 0xe8,
+	0x23, 0xd8, 0x36, 0x87, 0xa3, 0x73, 0x57, 0xf7, 0x93, 0xc0, 0xbf, 0xd0, 0x1c, 0xac, 0x14, 0xd7,
+	0x31, 0x87, 0x19, 0xc9, 0x30, 0x55, 0x93, 0xf3, 0xee, 0xfb, 0x20, 0x5a, 0xe7, 0xee, 0xb4, 0xf6,
+	0xd0, 0xc6, 0xda, 0xb7, 0xb9, 0xae, 0xb1, 0x74, 0xee, 0x4f, 0x02, 0xa4, 0x82, 0x12, 0xe8, 0x14,
+	0x32, 0xe3, 0x5c, 0x76, 0x2f, 0x46, 0x84, 0x63, 0xc9, 0xac, 0x6b, 0xad, 0x71, 0x31, 0x22, 0x38,
+	0x6d, 0x04, 0x46, 0x0e, 0x3d, 0x4a, 0xbb, 0x8e, 0xee, 0x1f, 0x56, 0x1c, 0x46, 0x02, 0x27, 0xbb,
+	0x8e, 0x7f, 0x66, 0x39, 0x73, 0x91, 0x09, 0xaf, 0x1f, 0x19, 0xe9, 0x6f, 0x01, 0x48, 0xd4, 0x30,
+	0x3d, 0x09, 0xa7, 0x2f, 0x20, 0x69, 0x48, 0x94, 0x8f, 0xe4, 0x92, 0xaa, 0x9f, 0x95, 0x6b, 0xa2,
+	0x80, 0x76, 0xe0, 0x46, 0x43, 0xad, 0x37, 0xf4, 0x66, 0xad, 0x20, 0x37, 0x54, 0xbd, 0x26, 0x9f,
+	0x56, 0xaa, 0x32, 0xbd, 0x8d, 0x20, 0xc8, 0xc8, 0xcd, 0x46, 0x95, 0x31, 0x8b, 0xe5, 0x8a, 0x5a,
+	0x17, 0xc3, 0x28, 0x03, 0xd0, 0x90, 0xc7, 0xe3, 0x08, 0x9d, 0x5c, 0x2b, 0x6b, 0x9a, 0x5a, 0xd0,
+	0x4b, 0x4d, 0x2a, 0xc7, 0x14, 0xd7, 0xc5, 0x2d, 0x7a, 0xb1, 0x29, 0x96, 0xf1, 0xd1, 0x89, 0x8c,
+	0x55, 0x31, 0x4a, 0xd7, 0xa0, 0xe6, 0x9b, 0xe5, 0x4a, 0x41, 0xaf, 0x54, 0x4b, 0x75, 0x31, 0x86,
+	0x6e, 0xc0, 0xb6, 0x72, 0x88, 0xab, 0x47, 0x6a, 0xb5, 0xae, 0x2b, 0x55, 0xad, 0x58, 0x2e, 0x89,
+	0x71, 0xaa, 0x5c, 0xa9, 0xa9, 0x3a, 0x56, 0x6b, 0x55, 0xdc, 0x10, 0x13, 0x74, 0x01, 0x7c, 0xa1,
+	0x32, 0x56, 0x0e, 0xcb, 0xc7, 0x6a, 0x5d, 0x04, 0x29, 0x12, 0x4f, 0x8a, 0x3b, 0xb9, 0x3f, 0x47,
+	0x21, 0x31, 0x2e, 0x6a, 0xf4, 0xf1, 0xb2, 0x0c, 0x7c, 0xba, 0xea, 0xbe, 0xf0, 0xf2, 0x24, 0xfc,
+	0xc1, 0xd2, 0x24, 0xdc, 0xd0, 0xc0, 0x5c, 0x1e, 0xfe, 0x7a, 0x36, 0x0f, 0x9f, 0x2f, 0xc9, 0xc3,
+	0xf5, 0x0d, 0x6e, 0x96, 0x8a, 0xd2, 0xbf, 0xc3, 0x97, 0xa5, 0xd1, 0x03, 0xb8, 0xdb, 0xd4, 0x8e,
+	0x55, 0xcc, 0xc6, 0x3a, 0x8f, 0xa6, 0x5e, 0xa9, 0x1c, 0x1f, 0xe9, 0x55, 0x5c, 0x50, 0x31, 0xcd,
+	0x10, 0x31, 0x89, 0x24, 0x78, 0xed, 0x12, 0x99, 0x14, 0x7a, 0x0d, 0x72, 0x1e, 0x4b, 0xa9, 0xc8,
+	0x5a, 0x49, 0x3f, 0x91, 0xb1, 0x56, 0xd6, 0x4a, 0x75, 0x96, 0x65, 0x62, 0x1a, 0xbd, 0x0a, 0xd9,
+	0x80, 0x25, 0x36, 0xbd, 0x56, 0xaa, 0x72, 0x6e, 0x06, 0xbd, 0x09, 0x0f, 0xe7, 0xd7, 0x91, 0x57,
+	0x35, 0xe5, 0xf0, 0x48, 0xc6, 0x1f, 0xea, 0x72, 0xb1, 0xe0, 0x89, 0x6e, 0xa3, 0x37, 0xe0, 0xfe,
+	0x2a, 0x82, 0x22, 0xba, 0x07, 0xbb, 0x63, 0xc1, 0x0f, 0x55, 0xac, 0xa9, 0x15, 0x5d, 0x39, 0xa9,
+	0x05, 0x44, 0xae, 0xa3, 0xfb, 0xf0, 0x7a, 0xc0, 0xec, 0x42, 0x21, 0x34, 0x23, 0xe4, 0x83, 0x9c,
+	0x12, 0xba, 0x31, 0x65, 0x6c, 0xa1, 0xc8, 0x4d, 0xea, 0xa1, 0xb1, 0x08, 0x56, 0x2b, 0xaa, 0x5c,
+	0x57, 0x03, 0xfc, 0x5b, 0x97, 0xf9, 0xa0, 0xa6, 0xe2, 0x22, 0x17, 0xbd, 0x4d, 0x2b, 0xd6, 0xe3,
+	0x17, 0xd4, 0x7c, 0xb3, 0xa4, 0xe7, 0xcb, 0x9a, 0x8c, 0x4f, 0xc5, 0x1d, 0x29, 0x12, 0x17, 0x44,
+	0xc8, 0xfd, 0x27, 0x04, 0x5b, 0xec, 0xa8, 0x43, 0x67, 0xcb, 0xaa, 0xea, 0xeb, 0xab, 0x9c, 0x94,
+	0x2f, 0xaf, 0xa8, 0xe7, 0x4b, 0x2b, 0x6a, 0x03, 0xe5, 0x73, 0xd5, 0xf4, 0xcb, 0xd9, 0x6a, 0x7a,
+	0xb6, 0xa4, 0x9a, 0xd6, 0x33, 0xb6, 0x61, 0x25, 0x3d, 0xbc, 0xa4, 0x90, 0x98, 0xe3, 0x77, 0x72,
+	0x5f, 0x86, 0x20, 0xe6, 0xdd, 0x12, 0xd0, 0xf3, 0x65, 0xae, 0x7f, 0x7b, 0xb5, 0x6b, 0xc6, 0xcb,
+	0x9d, 0xff, 0xf1, 0x52, 0xe7, 0x6f, 0xa4, 0x7e, 0xce, 0xfd, 0xbf, 0x9a, 0x75, 0xff, 0xd9, 0x12,
+	0xf7, 0xaf, 0x6b, 0xee, 0xea, 0x03, 0xe0, 0x5d, 0xb2, 0x36, 0x0f, 0x80, 0xa7, 0xe0, 0xaa, 0x02,
+	0xb0, 0x50, 0xfd, 0xd5, 0x05, 0x60, 0xd6, 0xdc, 0xd5, 0x06, 0xe0, 0x5f, 0x21, 0x88, 0xd0, 0x6b,
+	0x2a, 0x3a, 0x5d, 0xe6, 0xfd, 0x27, 0x2b, 0x5c, 0x72, 0x5f, 0xee, 0xfa, 0x8f, 0x96, 0xba, 0x7e,
+	0x7d, 0xdd, 0x73, 0x7e, 0xff, 0xc5, 0xac, 0xdf, 0x4f, 0x96, 0xf8, 0x7d, 0x2d, 0x5b, 0x57, 0xea,
+	0x74, 0xe9, 0xf7, 0x19, 0xc8, 0x35, 0x47, 0x7d, 0xcb, 0x68, 0x93, 0xf6, 0x82, 0x5e, 0x4d, 0x9d,
+	0xe9, 0xd5, 0xbe, 0x36, 0xf5, 0x48, 0xb9, 0x74, 0xde, 0x6c, 0xcf, 0xa6, 0xcd, 0xf7, 0x6c, 0x4f,
+	0x56, 0xd4, 0xb4, 0xb0, 0x77, 0xcb, 0x4f, 0xf7, 0x6e, 0x6f, 0xad, 0xa8, 0x6b, 0xaa, 0x87, 0x3b,
+	0x9c, 0xed, 0xe1, 0xf6, 0x56, 0xd4, 0x32, 0xd7, 0xcb, 0x1d, 0xce, 0xf6, 0x72, 0xab, 0x6a, 0x9a,
+	0xeb, 0xe9, 0xbe, 0x3b, 0xd5, 0xd3, 0x7d, 0x75, 0x55, 0x17, 0x8d, 0x7b, 0xbb, 0xdc, 0xdf, 0x85,
+	0x71, 0x5f, 0x76, 0x0a, 0x89, 0xd9, 0xfa, 0xf9, 0xd6, 0x5a, 0xd1, 0x9b, 0xf4, 0x1a, 0x86, 0xdb,
+	0x73, 0xf0, 0x44, 0x5b, 0xee, 0x27, 0x90, 0x9e, 0xe2, 0xa1, 0x13, 0x48, 0x4f, 0x25, 0x3a, 0xcb,
+	0x96, 0xcd, 0xba, 0xa6, 0x54, 0x30, 0xd3, 0xd1, 0x4d, 0xd8, 0x1a, 0x51, 0x0b, 0x5e, 0x86, 0xf3,
+	0x41, 0xee, 0x9f, 0x42, 0xf0, 0xfa, 0xff, 0x7c, 0x1e, 0xe8, 0x77, 0xd6, 0x4d, 0xae, 0xe5, 0x58,
+	0x7f, 0x26, 0xcc, 0x82, 0x3d, 0x5b, 0x0c, 0x76, 0xc3, 0xab, 0xf9, 0x2a, 0x78, 0xff, 0x2a, 0xf8,
+	0x97, 0xb2, 0x67, 0xf3, 0x58, 0xdf, 0x5b, 0x27, 0xf9, 0x97, 0xe3, 0xfc, 0xf1, 0x2c, 0xcc, 0xe3,
+	0xc5, 0x30, 0x37, 0xb8, 0x33, 0xad, 0x02, 0xf1, 0x1f, 0xc2, 0xe4, 0xfa, 0x73, 0x36, 0x0f, 0xf2,
+	0xfd, 0xf5, 0x6a, 0x73, 0x39, 0xcc, 0x9f, 0xce, 0xc2, 0x7c, 0xb6, 0x18, 0xe6, 0x46, 0x77, 0x93,
+	0x55, 0x81, 0xfa, 0xd7, 0x8c, 0xff, 0x03, 0xe8, 0xec, 0xd1, 0x7c, 0x65, 0x40, 0x17, 0xde, 0x01,
+	0x56, 0x01, 0xfa, 0x17, 0xc1, 0x3b, 0xce, 0x4f, 0xe6, 0x51, 0x7e, 0x73, 0x8d, 0x9d, 0x6d, 0x39,
+	0xc4, 0x1f, 0xcd, 0x42, 0x6c, 0x2e, 0x86, 0xb8, 0xfe, 0x71, 0xbb, 0x02, 0xbe, 0xc7, 0x7f, 0x10,
+	0x20, 0xc1, 0x92, 0x9d, 0xc9, 0x64, 0xe1, 0x26, 0x7f, 0xab, 0x68, 0x9c, 0xd6, 0x54, 0xbd, 0xa9,
+	0x15, 0xd4, 0x62, 0x59, 0x63, 0x7d, 0x72, 0x1c, 0x22, 0x79, 0xb9, 0xae, 0x8a, 0x02, 0x8a, 0x41,
+	0xb8, 0xa0, 0x1e, 0x8b, 0x21, 0x4a, 0x6a, 0xa8, 0xf5, 0x86, 0x18, 0x46, 0x49, 0x88, 0x51, 0xa6,
+	0x7e, 0x7c, 0x24, 0x46, 0xe8, 0x80, 0x3d, 0xb6, 0x1c, 0x1f, 0xf1, 0x07, 0x14, 0xac, 0x2a, 0xd5,
+	0x63, 0x15, 0x9f, 0x8a, 0x51, 0xca, 0x2a, 0xca, 0x4a, 0xa3, 0x8a, 0x4f, 0xc5, 0xd8, 0xd4, 0xdb,
+	0x4a, 0x1c, 0x5d, 0x87, 0xb4, 0x82, 0x9f, 0x3e, 0xd1, 0xc7, 0xa4, 0x04, 0x25, 0x31, 0xad, 0xfc,
+	0x4d, 0xe6, 0xf8, 0x48, 0x04, 0x4a, 0x62, 0xba, 0xc7, 0xa4, 0xe4, 0xe3, 0x01, 0xc4, 0x94, 0x9e,
+	0x31, 0x1c, 0x92, 0x3e, 0x6f, 0x0a, 0x65, 0x8d, 0xb6, 0xb0, 0xd3, 0x4d, 0x3e, 0x82, 0x8c, 0xcf,
+	0xa8, 0x37, 0xe4, 0x7c, 0x85, 0xc2, 0x10, 0x21, 0xe5, 0xd3, 0xf2, 0x6a, 0x43, 0xe6, 0xff, 0x5b,
+	0xf9, 0x14, 0x0a, 0x30, 0x1c, 0x9c, 0xa6, 0xc8, 0xac, 0xbf, 0x8c, 0x3c, 0xee, 0x80, 0x48, 0x5b,
+	0xd6, 0xa9, 0x4b, 0x49, 0x1a, 0x12, 0x5a, 0x55, 0xe3, 0x4e, 0xe3, 0x2f, 0x53, 0x93, 0x77, 0x01,
+	0x81, 0x6a, 0x99, 0x6e, 0xcf, 0xb9, 0x29, 0xaf, 0xd7, 0x66, 0x84, 0x30, 0xb7, 0xcd, 0xfa, 0x59,
+	0x46, 0x88, 0xe4, 0xbf, 0x71, 0xf6, 0x4e, 0xd7, 0x1a, 0x47, 0x7c, 0xcf, 0xb2, 0xbb, 0xfb, 0x81,
+	0x3f, 0x93, 0xcd, 0x61, 0xc7, 0x36, 0xf6, 0xd9, 0xdf, 0x0e, 0xfb, 0x5d, 0x2b, 0xc0, 0xf9, 0x24,
+	0xca, 0x88, 0x6f, 0xff, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x1f, 0xa0, 0x0a, 0xac, 0x7b, 0x1e, 0x00,
+	0x00,
 }
diff --git a/src/chromite/api/toolchain.proto b/src/chromite/api/toolchain.proto
index dad8fdf..103360c 100644
--- a/src/chromite/api/toolchain.proto
+++ b/src/chromite/api/toolchain.proto
@@ -43,22 +43,8 @@
   chromiumos.ArtifactProfileInfo profile_info = 6;
 }
 
-// TODO(crbug/1019868): Migrate to using chromiumos.PrepareForBuildResponse.
 message PrepareForToolchainBuildResponse {
-  // Does this artifact require a build?
-  // TODO(crbug/1034529): Once the users of this enum have moved to using
-  // artifacts.PrepareForBuildResponse.${NAME}, remove this enum.
-  enum OldBuildRelevance {
-    UNSPECIFIED = 0;
-    // Build is necessary to generate artifacts.
-    NEEDED = 1;
-    // Defer to other artifacts.  Used primarily for aggregation of artifact
-    // results.
-    UNKNOWN = 2;
-    // Artifacts are already generated.  The build is pointless.
-    POINTLESS = 3;
-  }
-  // See artifacts.proto in this directory.
+  // Does this artifact require a build?  See artifacts.proto in this directory.
   PrepareForBuildResponse.BuildRelevance build_relevance = 1;
 }
 
diff --git a/src/chromiumos/common.proto b/src/chromiumos/common.proto
index 2bb1fa4..c3fd3e1 100644
--- a/src/chromiumos/common.proto
+++ b/src/chromiumos/common.proto
@@ -196,23 +196,6 @@
   bytes serialized_proto = 1;
 }
 
-// TODO(crbug/1034529): Remove this after migrating users to
-// chromite.api.artifacts.PrepareForBuildResponse.
-message PrepareForBuildResponse {
-  // DEPRECTATED: Does this artifact require a build?
-  enum BuildRelevance {
-    UNSPECIFIED = 0;
-    // Build is necessary to generate artifacts.
-    NEEDED = 1;
-    // Defer to other artifacts.  Used primarily for aggregation of artifact
-    // results.
-    UNKNOWN = 2;
-    // Artifacts are already generated.  The build is pointless.
-    POINTLESS = 3;
-  }
-  BuildRelevance build_relevance = 1;
-}
-
 // TODO(crbug.com/1020615): Drop this from chromite/api/toolchain.proto (and
 // here) once usage has migrated to BuilderConfig.Artifacts.ArtifactType.
 // Meanwhile, keep this in sync with chromite/api/toolchain.proto.  The various