Revert "Emit declarations for typedefs that are needed by reflection."

sdk/lib/_internal/compiler/implementation/enqueue.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.
 
 part of dart2js;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
   final CodegenEnqueuer codegen;
 
-      } else if (element.isTypedef) {
-       TypedefElement typedef = element;
-       typedef.ensureResolved(compiler);
   String get name => 'Enqueue';
 
   EnqueueTask(Compiler compiler)
     : resolution = new ResolutionEnqueuer(
           compiler, compiler.backend.createItemCompilationContext),
       codegen = new CodegenEnqueuer(
           compiler, compiler.backend.createItemCompilationContext),
       super(compiler) {
     codegen.task = this;
     resolution.task = this;
@@ skipping 826 matching lines @@
     }
     CodegenWorkItem workItem = new CodegenWorkItem(
         element, itemCompilationContextCreator());
     queue.add(workItem);
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }