Revert "packages.proto: Add NeedsChromeSource endpoint."

This reverts commit 7e9f617ada9710f0f68a888023f7028c9913adfe.

Reason for revert: Breaks updating build API python bindings for chromite.  crbug/1086714 reopened with more detail.

Original change's description:
> packages.proto: Add NeedsChromeSource endpoint.
>
> BUG=chromium:1086714
> TEST=./generate.sh
>
> Change-Id: Icabbd23fa0ef51b49d5fb4ea668929a54d8221b9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2411808
> Reviewed-by: Michael Mortensen <mmortensen@google.com>
> Commit-Queue: Alex Klein <saklein@chromium.org>

Bug: chromium:1086714
Change-Id: Ie639d7e2b70210f188e0fe5991077c02c1a7ac71
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2657035
Reviewed-by: LaMont Jones <lamontjones@chromium.org>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
diff --git a/go/chromite/api/packages.pb.go b/go/chromite/api/packages.pb.go
index 0e3a663..d7b934d 100644
--- a/go/chromite/api/packages.pb.go
+++ b/go/chromite/api/packages.pb.go
@@ -1488,104 +1488,103 @@
 func init() { proto.RegisterFile("chromite/api/packages.proto", fileDescriptor_40286986e1d9a416) }
 
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+	0x60, 0x92, 0x13, 0x2c, 0x98, 0x23, 0xe4, 0xe1, 0x55, 0x5e, 0xab, 0xc5, 0x9d, 0x1a, 0x69, 0xa9,
+	0x66, 0x49, 0x31, 0x2b, 0x10, 0xff, 0xa8, 0xeb, 0x3a, 0x3d, 0x33, 0x4e, 0x0c, 0x99, 0x19, 0x3b,
+	0x90, 0x57, 0xc6, 0xd0, 0x0c, 0x14, 0x0f, 0xb6, 0xf7, 0x76, 0x1b, 0xf5, 0x8d, 0x67, 0x1b, 0x8d,
+	0xa7, 0x95, 0xff, 0xf8, 0x84, 0xed, 0x1d, 0x7b, 0xd7, 0x6a, 0xac, 0x1f, 0x6c, 0x6c, 0xee, 0x57,
+	0x32, 0x08, 0x41, 0xb9, 0xbe, 0xb3, 0xb5, 0xbb, 0xb1, 0xd9, 0xb0, 0xf7, 0x76, 0x0e, 0xac, 0x7a,
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+	0x40, 0x81, 0xeb, 0xef, 0xc0, 0xd1, 0x6b, 0x63, 0x38, 0x6a, 0x0d, 0xa4, 0xd6, 0x7e, 0x9e, 0x84,
+	0xb2, 0xe6, 0xef, 0x11, 0x7e, 0x4a, 0x9b, 0x7e, 0x16, 0x4a, 0xd1, 0x97, 0x35, 0x5a, 0x89, 0xab,
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+	0xd1, 0x8d, 0x94, 0xe4, 0xb0, 0x37, 0xb0, 0x71, 0xf3, 0x43, 0x30, 0x6d, 0xa2, 0x05, 0xb3, 0xa9,
+	0x27, 0x1d, 0x4a, 0x0b, 0x0f, 0x7d, 0xad, 0x1a, 0xb7, 0x3e, 0x88, 0xd3, 0x56, 0x8e, 0x01, 0xa5,
+	0x27, 0x75, 0x74, 0xeb, 0xc3, 0xb3, 0xbc, 0xb2, 0x73, 0x7b, 0xdc, 0xa1, 0xdf, 0x0f, 0x27, 0x35,
+	0x6b, 0x24, 0xc3, 0x19, 0x35, 0x28, 0x25, 0xc3, 0x19, 0x3d, 0xb4, 0x58, 0x50, 0x8c, 0x9c, 0xf9,
+	0x68, 0x39, 0x25, 0x97, 0xd4, 0xbc, 0x72, 0x06, 0x42, 0xeb, 0xfc, 0x12, 0x2e, 0xc8, 0xb6, 0x46,
+	0xe6, 0x99, 0xbd, 0xae, 0xf4, 0x8d, 0xb3, 0x1f, 0xcc, 0xfc, 0xdb, 0xf7, 0x46, 0xb6, 0x92, 0x45,
+	0xdf, 0xe9, 0x83, 0x21, 0xb9, 0xe1, 0xd0, 0x9d, 0xf1, 0x4f, 0x41, 0xe3, 0xee, 0x58, 0xd8, 0xb8,
+	0x65, 0xa3, 0xf2, 0xf6, 0xbd, 0x51, 0x1a, 0x8c, 0x2e, 0x95, 0xcc, 0xfa, 0xc3, 0xaf, 0x1e, 0x1c,
+	0xb3, 0xf0, 0xa0, 0xac, 0x31, 0x7e, 0xbc, 0x1a, 0xf9, 0x7f, 0x47, 0x9d, 0x36, 0xc7, 0xab, 0xf2,
+	0xf7, 0xdd, 0xea, 0x31, 0x5b, 0x8d, 0xfe, 0xf5, 0x3b, 0xca, 0x4b, 0xf2, 0xbd, 0xbf, 0x03, 0x00,
+	0x00, 0xff, 0xff, 0xc3, 0xb1, 0xde, 0xfa, 0x71, 0x14, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1623,9 +1622,6 @@
 	// Check if there is an available prebuilt for the most recent version of the
 	// package.
 	HasPrebuilt(ctx context.Context, in *HasPrebuiltRequest, opts ...grpc.CallOption) (*HasPrebuiltResponse, error)
-	// Check whether the Chrome source tree is needed.  Does not compile nor
-	// install any packages.
-	NeedsChromeSource(ctx context.Context, in *NeedsChromeSourceRequest, opts ...grpc.CallOption) (*NeedsChromeSourceResponse, error)
 	// The generic uprev process -- performs uprevs for all packages in the
 	// public and/or private overlays for the build target(s) specified.
 	// This handles all cros_workon packages except those that have a separate
@@ -1709,15 +1705,6 @@
 	return out, nil
 }
 
-func (c *packageServiceClient) NeedsChromeSource(ctx context.Context, in *NeedsChromeSourceRequest, opts ...grpc.CallOption) (*NeedsChromeSourceResponse, error) {
-	out := new(NeedsChromeSourceResponse)
-	err := c.cc.Invoke(ctx, "/chromite.api.PackageService/NeedsChromeSource", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
 func (c *packageServiceClient) Uprev(ctx context.Context, in *UprevPackagesRequest, opts ...grpc.CallOption) (*UprevPackagesResponse, error) {
 	out := new(UprevPackagesResponse)
 	err := c.cc.Invoke(ctx, "/chromite.api.PackageService/Uprev", in, out, opts...)
@@ -1761,9 +1748,6 @@
 	// Check if there is an available prebuilt for the most recent version of the
 	// package.
 	HasPrebuilt(context.Context, *HasPrebuiltRequest) (*HasPrebuiltResponse, error)
-	// Check whether the Chrome source tree is needed.  Does not compile nor
-	// install any packages.
-	NeedsChromeSource(context.Context, *NeedsChromeSourceRequest) (*NeedsChromeSourceResponse, error)
 	// The generic uprev process -- performs uprevs for all packages in the
 	// public and/or private overlays for the build target(s) specified.
 	// This handles all cros_workon packages except those that have a separate
@@ -1801,9 +1785,6 @@
 func (*UnimplementedPackageServiceServer) HasPrebuilt(ctx context.Context, req *HasPrebuiltRequest) (*HasPrebuiltResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method HasPrebuilt not implemented")
 }
-func (*UnimplementedPackageServiceServer) NeedsChromeSource(ctx context.Context, req *NeedsChromeSourceRequest) (*NeedsChromeSourceResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method NeedsChromeSource not implemented")
-}
 func (*UnimplementedPackageServiceServer) Uprev(ctx context.Context, req *UprevPackagesRequest) (*UprevPackagesResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Uprev not implemented")
 }
@@ -1941,24 +1922,6 @@
 	return interceptor(ctx, in, info, handler)
 }
 
-func _PackageService_NeedsChromeSource_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(NeedsChromeSourceRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(PackageServiceServer).NeedsChromeSource(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/chromite.api.PackageService/NeedsChromeSource",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(PackageServiceServer).NeedsChromeSource(ctx, req.(*NeedsChromeSourceRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
 func _PackageService_Uprev_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(UprevPackagesRequest)
 	if err := dec(in); err != nil {
@@ -2028,10 +1991,6 @@
 			Handler:    _PackageService_HasPrebuilt_Handler,
 		},
 		{
-			MethodName: "NeedsChromeSource",
-			Handler:    _PackageService_NeedsChromeSource_Handler,
-		},
-		{
 			MethodName: "Uprev",
 			Handler:    _PackageService_Uprev_Handler,
 		},
diff --git a/src/chromite/api/packages.proto b/src/chromite/api/packages.proto
index a9950f7..c5d8698 100644
--- a/src/chromite/api/packages.proto
+++ b/src/chromite/api/packages.proto
@@ -295,6 +295,13 @@
   // Check if the build target has chrome in its depgraph.
   rpc BuildsChrome(BuildsChromeRequest) returns (BuildsChromeResponse);
 
+  // Check whether the Chrome source tree is needed.  Does not compile nor
+  // install any packages.
+  // TODO(crbug/1086714): Uncomment this when the endpoint actually exists.
+  // See https://ci.chromium.org/b/8875124107016783184
+  //rpc NeedsChromeSource(NeedsChromeSourceRequest)
+  //  returns (NeedsChromeSourceResponse);
+
   // Find the best (highest) available version of the requested package.
   // This must be run after the chroot is set up (for chroot package lookup) or
   // after the sysroot is created (for build target package lookup).
@@ -326,11 +333,6 @@
   // package.
   rpc HasPrebuilt(HasPrebuiltRequest) returns (HasPrebuiltResponse);
 
-  // Check whether the Chrome source tree is needed.  Does not compile nor
-  // install any packages.
-  rpc NeedsChromeSource(NeedsChromeSourceRequest)
-    returns (NeedsChromeSourceResponse);
-
   // The generic uprev process -- performs uprevs for all packages in the
   // public and/or private overlays for the build target(s) specified.
   // This handles all cros_workon packages except those that have a separate