Remove Registry from registerMetadataConstant

pkg/compiler/lib/src/common/backend_api.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.backend_api;
 
 import 'dart:async' show Future;
 
 import '../common.dart';
 import '../common/codegen.dart' show CodegenImpact;
@@ skipping 113 matching lines @@
   /// supported by the backend.
   bool enableCodegenWithErrorsIfSupported(Spannable node);
 
   /// Enable deferred loading. Returns `true` if the backend supports deferred
   /// loading.
   bool enableDeferredLoadingIfSupported(Spannable node, Registry registry);
 
   /// Called during codegen when [constant] has been used.
   void registerCompileTimeConstant(ConstantValue constant, Registry registry) {}
 
-  /// Called during resolution when a constant value for [metadata] on
-  /// [annotatedElement] has been evaluated.
-  void registerMetadataConstant(MetadataAnnotation metadata,
-      Element annotatedElement, Registry registry) {}
-
   /// Called to notify to the backend that a class is being instantiated.
   // TODO(johnniwinther): Remove this. It's only called once for each [cls] and
   // only with [Compiler.globalDependencies] as [registry].
   void registerInstantiatedClass(
       ClassElement cls, Enqueuer enqueuer, Registry registry) {}
 
   /// Called to notify to the backend that a class is implemented by an
   /// instantiated class.
   void registerImplementedClass(
       ClassElement cls, Enqueuer enqueuer, Registry registry) {}
@@ skipping 289 matching lines @@
   }
 }
 
 /// Interface for serialization of backend specific data.
 class BackendSerialization {
   const BackendSerialization();
 
   SerializerPlugin get serializer => const SerializerPlugin();
   DeserializerPlugin get deserializer => const DeserializerPlugin();
 }