BuilderConfig.Orchestrator remove children, now child_specs.

Remove the deprecated BuilderConfg.Orchestrator.children which has been
replaced by BuilderConfig.Orchestrator.child_specs featuring the ability
to specify special handling for the child.

BUG=None
TEST=./generate.sh

Change-Id: Ida0a675eb078ea5df9e88c47e76d95237df8d812
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2054069
Commit-Queue: David Burger <dburger@chromium.org>
Tested-by: David Burger <dburger@chromium.org>
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Mike Nichols <mikenichols@chromium.org>
diff --git a/descpb.bin b/descpb.bin
index f40359e..5acfd77 100644
--- a/descpb.bin
+++ b/descpb.bin
Binary files differ
diff --git a/go/chromiumos/builder_config.pb.go b/go/chromiumos/builder_config.pb.go
index 54bdb8d..81fc45e 100644
--- a/go/chromiumos/builder_config.pb.go
+++ b/go/chromiumos/builder_config.pb.go
@@ -637,10 +637,6 @@
 // Configuration pertaining to builders operating as "orchestrators".
 // Orchestrators orchestrate the running of other child builders.
 type BuilderConfig_Orchestrator struct {
-	// BuilderConfig.Id.name of the child builds. They would expect to match
-	// this name and the BuilderConfig.Id.branch and BuilderConfig.Id.type of
-	// this parent orchestrator builder.
-	Children   []string                                `protobuf:"bytes,1,rep,name=children,proto3" json:"children,omitempty"`
 	ChildSpecs []*BuilderConfig_Orchestrator_ChildSpec `protobuf:"bytes,5,rep,name=child_specs,json=childSpecs,proto3" json:"child_specs,omitempty"`
 	// GitilesCommit to use if not provided.
 	GitilesCommit *GitilesCommit `protobuf:"bytes,2,opt,name=gitiles_commit,json=gitilesCommit,proto3" json:"gitiles_commit,omitempty"`
@@ -677,13 +673,6 @@
 
 var xxx_messageInfo_BuilderConfig_Orchestrator proto.InternalMessageInfo
 
-func (m *BuilderConfig_Orchestrator) GetChildren() []string {
-	if m != nil {
-		return m.Children
-	}
-	return nil
-}
-
 func (m *BuilderConfig_Orchestrator) GetChildSpecs() []*BuilderConfig_Orchestrator_ChildSpec {
 	if m != nil {
 		return m.ChildSpecs
@@ -1556,139 +1545,139 @@
 func init() { proto.RegisterFile("chromiumos/builder_config.proto", fileDescriptor_6fe67302c16003fb) }
 
 var fileDescriptor_6fe67302c16003fb = []byte{
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+	0x28, 0xbd, 0x14, 0x00, 0x00,
 }
diff --git a/src/chromiumos/builder_config.proto b/src/chromiumos/builder_config.proto
index 3c51bb4..4a6b993 100644
--- a/src/chromiumos/builder_config.proto
+++ b/src/chromiumos/builder_config.proto
@@ -112,12 +112,7 @@
   // Configuration pertaining to builders operating as "orchestrators".
   // Orchestrators orchestrate the running of other child builders.
   message Orchestrator {
-    // TODO(dburger): transition to child_specs and remove children.
-
-    // BuilderConfig.Id.name of the child builds. They would expect to match
-    // this name and the BuilderConfig.Id.branch and BuilderConfig.Id.type of
-    // this parent orchestrator builder.
-    repeated string children = 1;
+    reserved 1;
 
     // Defines a child the orchestrator spawns and how it is handled.
     message ChildSpec {