[cleanup] delete dead code leftover from 48eff34c

Few pieces leftover which are now effectively dead code and can be safely
deleted.

BUG=v8:3502
LOG=N
R=arv@chromium.org

Review URL: https://codereview.chromium.org/1052963004

Cr-Commit-Position: refs/heads/master@{#27759}

src/array.js

@@ -361,7 +361,7 @@ function ArrayToString() {
     func = array.join;
   }
   if (!IS_SPEC_FUNCTION(func)) {
-    return %_CallFunction(array, DefaultObjectToString);
+    return %_CallFunction(array, ObjectToString);
   }
   return %_CallFunction(array, func);
 }

src/harmony-tostring.js

@@ -4,24 +4,6 @@
 
 "use strict";
 
-// This file relies on the fact that the following declaration has been made
-// in runtime.js and symbol.js:
-// var $Object = global.Object;
-
-DefaultObjectToString = ObjectToStringHarmony;
-// ES6 draft 08-24-14, section 19.1.3.6
-function ObjectToStringHarmony() {
-  if (IS_UNDEFINED(this) && !IS_UNDETECTABLE(this)) return "[object Undefined]";
-  if (IS_NULL(this)) return "[object Null]";
-  var O = ToObject(this);
-  var builtinTag = %_ClassOf(O);
-  var tag = O[symbolToStringTag];
-  if (!IS_STRING(tag)) {
-    tag = builtinTag;
-  }
-  return "[object " + tag + "]";
-}
-
 function HarmonyToStringExtendSymbolPrototype() {
   %CheckIsBootstrapping();
 

src/messages.js

@@ -301,7 +301,7 @@ function ToStringCheckErrorObject(obj) {
 
 
 function ToDetailString(obj) {
-  if (obj != null && IS_OBJECT(obj) && obj.toString === DefaultObjectToString) {
+  if (obj != null && IS_OBJECT(obj) && obj.toString === ObjectToString) {
     var constructor = obj.constructor;
     if (typeof constructor == "function") {
       var constructorName = constructor.name;

src/v8natives.js

@@ -216,7 +216,6 @@ SetUpGlobal();
 // ----------------------------------------------------------------------------
 // Object
 
-var DefaultObjectToString = ObjectToString;
 // ECMA-262 - 15.2.4.2
 function NoSideEffectsObjectToString() {
   if (IS_UNDEFINED(this) && !IS_UNDETECTABLE(this)) return "[object Undefined]";