[runtime] Remove obsolete %ObjectEquals runtime entry.

src/debug/mirrors.js

 // Copyright 2006-2012 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.
 
 (function(global, utils) {
 "use strict";
 
 // ----------------------------------------------------------------------------
 // Imports
 
@@ skipping 794 matching lines @@
  */
 ObjectMirror.prototype.lookupProperty = function(value) {
   var properties = this.properties();
 
   // Look for property value in properties.
   for (var i = 0; i < properties.length; i++) {
 
     // Skip properties which are defined through accessors.
     var property = properties[i];
     if (property.propertyType() != PropertyType.AccessorConstant) {
-      if (%_ObjectEquals(property.value_, value.value_)) {
+      if (property.value_ === value.value_) {
         return property;
       }
     }
   }
 
   // Nothing found.
   return GetUndefinedMirror();
 };
 
 
@@ skipping 2218 matching lines @@
 // Functions needed by the debugger runtime.
 utils.InstallFunctions(utils, DONT_ENUM, [
   "ClearMirrorCache", ClearMirrorCache
 ]);
 
 // Export to debug.js
 utils.Export(function(to) {
   to.MirrorType = MirrorType;
 });
 })