Remove runtime flags for Proxy and Reflect

test/mjsunit/es6/proxies-example-membrane.js

 // Copyright 2011 the V8 project authors. All rights reserved.
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 // 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.
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-// Flags: --harmony --harmony-proxies
-
-
 
 // A simple membrane. Adapted from:
 // http://wiki.ecmascript.org/doku.php?id=harmony:proxies#a_simple_membrane
 
 function createSimpleMembrane(target) {
   let enabled = true;
 
   function wrap(obj) {
     if (obj !== Object(obj)) return obj;
 
@@ skipping 261 matching lines @@
   assertThrows(function() { w.c }, Error)
   assertThrows(function() { wb.bb }, Error)
   assertEquals(3, wr.a)
   assertThrows(function() { wf(4) }, Error)
   assertEquals(6, wfx.a)
   assertEquals(7, wgx.aa)
   assertThrows(function() { wh4.q }, Error)
   assertThrows(function() { ws5.x }, Error)
   assertThrows(function() { ws5x.y }, Error)
 }