[intrinsics] Remove unused %_RegExpExec and %_NumberToString.

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 519 matching lines @@
  * @constructor
  * @extends ValueMirror
  */
 function NumberMirror(value) {
   %_Call(ValueMirror, this, MirrorType.NUMBER_TYPE, value);
 }
 inherits(NumberMirror, ValueMirror);
 
 
 NumberMirror.prototype.toText = function() {
-  return %_NumberToString(this.value_);
+  return %NumberToString(this.value_);
 };
 
 
 /**
  * Mirror object for string values.
  * @param {string} value The string value reflected by this mirror
  * @constructor
  * @extends ValueMirror
  */
 function StringMirror(value) {
@@ skipping 1850 matching lines @@
   "GeneratorMirror", GeneratorMirror,
   "PropertyMirror", PropertyMirror,
   "InternalPropertyMirror", InternalPropertyMirror,
   "FrameMirror", FrameMirror,
   "ScriptMirror", ScriptMirror,
   "ScopeMirror", ScopeMirror,
   "FrameDetails", FrameDetails,
 ]);
 
 })