Remove runtime flags for Proxy and Reflect

test/mjsunit/es6/reflect-get-prototype-of.js

 // Copyright 2010-2015 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Tests the Reflect.getPrototypeOf - ES6 26.1.8.
 // This is adapted from mjsunit/get-prototype-of.js.
 
-// Flags: --harmony-reflect
-
 
 
 function assertPrototypeOf(func, expected) {
   assertEquals(expected, Reflect.getPrototypeOf(func));
 }
 
 
 assertThrows(function() {
   Reflect.getPrototypeOf(undefined);
 }, TypeError);
@@ skipping 87 matching lines @@
 for (var f of functions) {
   assertPrototypeOf(f, Function.prototype);
   assertPrototypeOf(new f(), f.prototype);
 }
 
 var p = new Promise(function() {});
 assertPrototypeOf(p, Promise.prototype);
 
 var dv = new DataView(new ArrayBuffer());
 assertPrototypeOf(dv, DataView.prototype);