Delete --harmony-computed-property-names flag

test/mjsunit/es6/computed-property-names-object-literals-methods.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.
 
-// Flags: --harmony-computed-property-names
-
 
 function ID(x) {
   return x;
 }
 
 
 (function TestMethodComputedNameString() {
   var object = {
     a() { return 'A'},
     ['b']() { return 'B'; },
@@ skipping 95 matching lines @@
   'use strict';
   // ES5 does not allow duplicate keys.
   // ES6 does but we haven't changed our code yet.
 
   var object = {
     a() { return 1; },
     ['a']() { return 2; },
   };
   assertEquals(2, object.a());
 })();