dart2js: Remove unused variable.

pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart

 // Copyright (c) 2013, 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.js_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
@@ skipping 334 matching lines @@
        'globalFunctions': globalFunctionsAccess,
        'enabledInvokeOn': compiler.enabledInvokeOn,
        'interceptedNames': interceptedNamesAccess,
        'interceptedNamesSet': interceptedNamesSet,
        'notInCspMode': !compiler.useContentSecurityPolicy,
        'needsClassSupport': oldEmitter.needsClassSupport});
 
   jsAst.Expression allClassesAccess =
       emitter.generateEmbeddedGlobalAccess(embeddedNames.ALL_CLASSES);
 
-  String specProperty = '"${namer.nativeSpecProperty}"';  // "%"
-
   // Class descriptions are collected in a JS object.
   // 'finishClasses' takes all collected descriptions and sets up
   // the prototype.
   // Once set up, the constructors prototype field satisfy:
   //  - it contains all (local) members.
   //  - its internal prototype (__proto__) points to the superclass'
   //    prototype field.
   //  - the prototype's constructor field points to the JavaScript
   //    constructor.
   // For engines where we have access to the '__proto__' we can manipulate
@@ skipping 201 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }