refactor: remove ts2dart annotations

modules/@angular/core/test/change_detection/util.ts

@@ -9,10 +9,8 @@
 import {isBlank} from '../../src/facade/lang';
 
 export function iterableChangesAsString(
-    {collection = /*@ts2dart_const*/[] as any, previous = /*@ts2dart_const*/[] as any,
-     additions = /*@ts2dart_const*/[] as any, moves = /*@ts2dart_const*/[] as any,
-     removals = /*@ts2dart_const*/[] as any,
-     identityChanges = /*@ts2dart_const*/[] as any}): string {
+    {collection = [] as any, previous = [] as any, additions = [] as any, moves = [] as any,
+     removals = [] as any, identityChanges = [] as any}): string {
   return 'collection: ' + collection.join(', ') + '\n' +
       'previous: ' + previous.join(', ') + '\n' +
       'additions: ' + additions.join(', ') + '\n' +