Remove runtime flags for Proxy and Reflect

test/mjsunit/es6/proxies-apply.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.
 
-// Flags: --harmony-proxies --harmony-reflect
-
 (function testNonCallable() {
   var proxy = new Proxy({},{});
   assertThrows(function(){ proxy() }, TypeError);
 
   var proxy2 = new Proxy(proxy, {});
   assertThrows(function(){ proxy2() }, TypeError);
 })();
 
 (function testCallProxyFallbackNoArguments() {
   var called = false;
@@ skipping 96 matching lines @@
     assertThrows(() => { Reflect.apply(proxy_to_proxy, { proxy }, []); },
                  TypeError);
     assertThrows(() => {
           Function.prototype.call.apply(proxy_to_proxy, [null]);
         }, TypeError);
     assertThrows(() => {
           Function.prototype.apply.apply(proxy_to_proxy, [null, []]);
         }, TypeError);
   });
 })();