Revert "ES6: Add support for Map/Set forEach"

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 9d172bb97979c3359d158a152f041454ece25174..3c76e5467c970b410371f1b03802909b2556b292 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -1258,18 +1258,6 @@ Handle<JSFunction> Factory::NewFunctionWithoutPrototype(Handle<String> name,
 }
 
 
-Handle<JSObject> Factory::NewIteratorResultObject(Handle<Object> value,
-                                                     bool done) {
-  Handle<Map> map(isolate()->native_context()->iterator_result_map());
-  Handle<JSObject> result = NewJSObjectFromMap(map, NOT_TENURED, false);
-  result->InObjectPropertyAtPut(
-      JSGeneratorObject::kResultValuePropertyIndex, *value);
-  result->InObjectPropertyAtPut(
-      JSGeneratorObject::kResultDonePropertyIndex, *ToBoolean(done));
-  return result;
-}
-
-
 Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
   Handle<FixedArray> array = NewFixedArray(length, TENURED);
   array->set_map_no_write_barrier(*scope_info_map());
@@ -2115,5 +2103,4 @@ Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
-
 } }  // namespace v8::internal