all: fix stale comments

Change-Id: I4bfef75bc74c8d876a3926635bea12bbbaf4993e
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/185238
Reviewed-by: Damien Neil <dneil@google.com>

cmd/protoc-gen-go/internal_gengo/reflect.go

@@ -17,8 +17,6 @@ import (
 	"google.golang.org/protobuf/types/descriptorpb"
 )
 
-// TODO: Add support for proto options.
-
 func genReflectFileDescriptor(gen *protogen.Plugin, g *protogen.GeneratedFile, f *fileInfo) {
 	g.P("var ", f.GoDescriptorIdent, " ", protoreflectPackage.Ident("FileDescriptor"))
 	g.P()

internal/impl/legacy_message.go

@@ -90,14 +90,11 @@ var (
 	aberrantMessageDescCache map[reflect.Type]protoreflect.MessageDescriptor
 )
 
-// aberrantLoadEnumDesc returns an EnumDescriptor derived from the Go type,
+// aberrantLoadMessageDesc returns an EnumDescriptor derived from the Go type,
 // which must not implement protoreflect.ProtoMessage or messageV1.
 //
 // This is a best-effort derivation of the message descriptor using the protobuf
 // tags on the struct fields.
-//
-// The finalized flag determines whether the returned message descriptor must
-// be fully initialized.
 func aberrantLoadMessageDesc(t reflect.Type) pref.MessageDescriptor {
 	aberrantMessageDescLock.Lock()
 	defer aberrantMessageDescLock.Unlock()

reflect/protoreflect/type.go

@@ -27,8 +27,6 @@ type Descriptor interface {
 	// Support for this functionality is optional and may return nil.
 	ParentFile() FileDescriptor
 
-	// TODO: Switch the signature of Parent to drop the bool.
-
 	// Parent returns the parent containing this descriptor declaration.
 	// The following shows the mapping from child type to possible parent types:
 	//

runtime/protoiface/legacy.go

@@ -22,8 +22,6 @@ type ExtensionDescV1 struct {
 	// Type is the descriptor type for the extension field using the v2 API.
 	// If populated, the information in this field takes precedence over
 	// all other fields in ExtensionDescV1.
-	//
-	// TODO: Delete this and make this whole struct implement ExtensionDescV1.
 	Type protoreflect.ExtensionType
 
 	// ExtendedType is a typed nil-pointer to the parent message type that