Remove flags for spread calls and arrays

test/mjsunit/es6/spread-array.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-spread-arrays --allow-natives-syntax
+// Flags: --allow-natives-syntax
 
 (function TestBasics() {
   var a = [1, 2];
   var b = [...a];
   assertArrayEquals([1, 2], b)
 
   assertArrayEquals(['a', 'b', 'c', 'd', 'e', 'f'],
                     ['a', ...'bc', 'd', ...'ef'])
 })();
 
@@ skipping 154 matching lines @@
         }
       };
     }
   };
   function f() {
     return [0, ...iter];
   }
 
   assertArrayEquals([0, 1, 2], f());
 });