[es6] remove --harmony-templates flag

src/templates.js

 // Copyright 2014 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.
 
 "use strict";
 
 var callSiteCache = new $Map;
 
 function SameCallSiteElements(rawStrings, other) {
   var length = rawStrings.length;
@@ skipping 40 matching lines @@
 function GetTemplateCallSite(siteObj, rawStrings, hash) {
   var cached = GetCachedCallSite(rawStrings, hash);
 
   if (!IS_UNDEFINED(cached)) return cached;
 
   %AddNamedProperty(siteObj, "raw", %ObjectFreeze(rawStrings),
       READ_ONLY | DONT_ENUM | DONT_DELETE);
 
   return SetCachedCallSite(%ObjectFreeze(siteObj), hash);
 }
-
-
-// ES6 Draft 10-14-2014, section 21.1.2.4
-function StringRaw(callSite) {
-  // TODO(caitp): Use rest parameters when implemented
-  var numberOfSubstitutions = %_ArgumentsLength();
-  var cooked = ToObject(callSite);
-  var raw = ToObject(cooked.raw);
-  var literalSegments = ToLength(raw.length);
-  if (literalSegments <= 0) return "";
-
-  var result = ToString(raw[0]);
-
-  for (var i = 1; i < literalSegments; ++i) {
-    if (i < numberOfSubstitutions) {
-      result += ToString(%_Arguments(i));
-    }
-    result += ToString(raw[i]);
-  }
-
-  return result;
-}
-
-
-function ExtendStringForTemplates() {
-  %CheckIsBootstrapping();
-
-  // Set up the non-enumerable functions on the String object.
-  InstallFunctions($String, DONT_ENUM, $Array(
-    "raw", StringRaw
-  ));
-}
-
-ExtendStringForTemplates();