chromite: drop event_file support

Chromite itself ignores this option now.

BUG=chromium:970829
TEST=CQ passes

Change-Id: I98cf9c52542f0f150172cce7bb97935f5c3bfda4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2087908
Reviewed-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/go/chromite/api/sysroot.pb.go b/go/chromite/api/sysroot.pb.go
index 91ee020..d7c40b3 100644
--- a/go/chromite/api/sysroot.pb.go
+++ b/go/chromite/api/sysroot.pb.go
@@ -639,8 +639,6 @@
 type InstallPackagesRequest_Flags struct {
 	// Compile from source (true), or use bin packages (false).
 	CompileSource bool `protobuf:"varint,1,opt,name=compile_source,json=compileSource,proto3" json:"compile_source,omitempty"`
-	// Event file location.
-	EventFile string `protobuf:"bytes,2,opt,name=event_file,json=eventFile,proto3" json:"event_file,omitempty"`
 	// Whether to start goma.
 	UseGoma bool `protobuf:"varint,3,opt,name=use_goma,json=useGoma,proto3" json:"use_goma,omitempty"`
 	// Whether a toolchain change has occurred.
@@ -682,13 +680,6 @@
 	return false
 }
 
-func (m *InstallPackagesRequest_Flags) GetEventFile() string {
-	if m != nil {
-		return m.EventFile
-	}
-	return ""
-}
-
 func (m *InstallPackagesRequest_Flags) GetUseGoma() bool {
 	if m != nil {
 		return m.UseGoma
@@ -882,65 +873,64 @@
 func init() { proto.RegisterFile("chromite/api/sysroot.proto", fileDescriptor_f8efa85b3e33e938) }
 
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+	0x60, 0xca, 0x9d, 0x50, 0x71, 0xce, 0x42, 0x8a, 0xbe, 0x85, 0xae, 0xa6, 0x44, 0xee, 0xea, 0x6f,
+	0xbe, 0xf3, 0xf6, 0x95, 0x18, 0xd3, 0x60, 0x0c, 0xc3, 0x85, 0x81, 0x8f, 0x0e, 0x96, 0xae, 0x5b,
+	0xfe, 0x2d, 0x74, 0xde, 0x5b, 0x0f, 0x6c, 0xd8, 0x08, 0x8c, 0x16, 0xe7, 0x1d, 0xda, 0x5b, 0x6b,
+	0x80, 0x3b, 0xef, 0xae, 0x82, 0x19, 0x8a, 0xe7, 0x30, 0x5c, 0xb8, 0x1b, 0xe8, 0x9d, 0x75, 0x86,
+	0x95, 0xb3, 0xb7, 0x02, 0x65, 0xea, 0xbf, 0x80, 0x9d, 0x4b, 0x8f, 0x1d, 0x79, 0xcd, 0x1a, 0xab,
+	0x3c, 0xed, 0xf8, 0x6b, 0xe3, 0x35, 0xbb, 0x33, 0xfc, 0xe3, 0x1f, 0x67, 0x73, 0x36, 0xbb, 0x47,
+	0xd6, 0xa3, 0x8f, 0x7f, 0xf8, 0x30, 0xe2, 0x33, 0x2f, 0x79, 0x5c, 0x44, 0x7e, 0xed, 0x37, 0x98,
+	0xa5, 0x13, 0x41, 0xfc, 0xf2, 0x27, 0xd8, 0x8f, 0xb8, 0x5f, 0xff, 0xaf, 0x3e, 0xed, 0x96, 0xe1,
+	0x87, 0xff, 0x05, 0x00, 0x00, 0xff, 0xff, 0xe9, 0xdf, 0x7f, 0x94, 0x98, 0x0b, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/src/chromite/api/sysroot.proto b/src/chromite/api/sysroot.proto
index 9781ca0..b90620f 100644
--- a/src/chromite/api/sysroot.proto
+++ b/src/chromite/api/sysroot.proto
@@ -99,10 +99,10 @@
 
 message InstallPackagesRequest {
   message Flags {
+    reserved 2;
+
     // Compile from source (true), or use bin packages (false).
     bool compile_source = 1;
-    // Event file location.
-    string event_file = 2;
     // Whether to start goma.
     bool use_goma = 3;
     // Whether a toolchain change has occurred.