Remove Registry

pkg/compiler/lib/src/js_backend/backend.dart

Index: pkg/compiler/lib/src/js_backend/backend.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend.dart b/pkg/compiler/lib/src/js_backend/backend.dart
index 56e8e89180a74eefc363f6a85d257a814843aa66..81f77be5e0ca2cdc65e33b0d4afb1136ea9c15cc 100644
--- a/pkg/compiler/lib/src/js_backend/backend.dart
+++ b/pkg/compiler/lib/src/js_backend/backend.dart
@@ -19,7 +19,6 @@ import '../common/backend_api.dart'
         NativeRegistry;
 import '../common/codegen.dart' show CodegenImpact, CodegenWorkItem;
 import '../common/names.dart' show Identifiers, Selectors, Uris;
-import '../common/registry.dart' show Registry;
 import '../common/resolution.dart' show Frontend, Resolution, ResolutionImpact;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
@@ -1928,9 +1927,6 @@ class JavaScriptBackend extends Backend {
     }
   }
 
-  /// Called when [:new Symbol(...):] is seen.
-  void registerNewSymbol(Registry registry) {}
-
   /// Should [element] (a getter) that would normally not be generated due to
   /// treeshaking be retained for reflection?
   bool shouldRetainGetter(Element element) {