[cleanup] delete dead code leftover from 48eff34

src/v8natives.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file relies on the fact that the following declarations have been made
 // in runtime.js:
 // var $Object = global.Object;
 // var $Boolean = global.Boolean;
 // var $Number = global.Number;
 // var $Function = global.Function;
@@ skipping 198 matching lines @@
     "eval", GlobalEval
   ));
 }
 
 SetUpGlobal();
 
 
 // ----------------------------------------------------------------------------
 // Object
 
-var DefaultObjectToString = ObjectToString;
 // ECMA-262 - 15.2.4.2
 function NoSideEffectsObjectToString() {
   if (IS_UNDEFINED(this) && !IS_UNDETECTABLE(this)) return "[object Undefined]";
   if (IS_NULL(this)) return "[object Null]";
   return "[object " + %_ClassOf(TO_OBJECT_INLINE(this)) + "]";
 }
 
 
 function ObjectToString() {
   if (IS_UNDEFINED(this) && !IS_UNDETECTABLE(this)) return "[object Undefined]";
@@ skipping 1684 matching lines @@
   }
   if (!IS_SPEC_FUNCTION(method)) {
     throw MakeTypeError('not_iterable', [obj]);
   }
   var iterator = %_CallFunction(obj, method);
   if (!IS_SPEC_OBJECT(iterator)) {
     throw MakeTypeError('not_an_iterator', [iterator]);
   }
   return iterator;
 }