Remove the Proxy enumerate trap

src/js/proxy.js

 // Copyright 2015 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";
 
 %CheckIsBootstrapping();
 
 // ----------------------------------------------------------------------------
 // Imports
 //
 var GlobalProxy = global.Proxy;
-var MakeTypeError;
-
-utils.Import(function(from) {
-  MakeTypeError = from.MakeTypeError;
-});
 
 //----------------------------------------------------------------------------
 
 function ProxyCreateRevocable(target, handler) {
   var p = new GlobalProxy(target, handler);
   return {proxy: p, revoke: () => %JSProxyRevoke(p)};
 }
 
-// -------------------------------------------------------------------
-// Proxy Builtins
-
-// Implements part of ES6 9.5.11 Proxy.[[Enumerate]]:
-// Call the trap, which should return an iterator, exhaust the iterator,
-// and return an array containing the values.
-function ProxyEnumerate(trap, handler, target) {
-  // 7. Let trapResult be ? Call(trap, handler, «target»).
-  var trap_result = %_Call(trap, handler, target);
-  // 8. If Type(trapResult) is not Object, throw a TypeError exception.
-  if (!IS_RECEIVER(trap_result)) {
-    throw MakeTypeError(kProxyEnumerateNonObject);
-  }
-  // 9. Return trapResult.
-  var result = [];
-  for (var it = trap_result.next(); !it.done; it = trap_result.next()) {
-    var key = it.value;
-    // Not yet spec'ed as of 2015-11-25, but will be spec'ed soon:
-    // If the iterator returns a non-string value, throw a TypeError.
-    if (!IS_STRING(key)) {
-      throw MakeTypeError(kProxyEnumerateNonString);
-    }
-    result.push(key);
-  }
-  return result;
-}
-
 //-------------------------------------------------------------------
 
 //Set up non-enumerable properties of the Proxy object.
 utils.InstallFunctions(GlobalProxy, DONT_ENUM, [
   "revocable", ProxyCreateRevocable
 ]);
 
-// -------------------------------------------------------------------
-// Exports
-
-%InstallToContext([
-  "proxy_enumerate", ProxyEnumerate,
-]);
-
 })