Remove runtime flags for Proxy and Reflect

test/mjsunit/es6/proxies-json.js

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-// Flags: --harmony-proxies --harmony-reflect
-
 
 
 ///////////////////////////////////////////////////////////////////////////////
 // JSON.stringify
 
 
 function testStringify(expected, object) {
   // Test fast case that bails out to slow case.
   assertEquals(expected, JSON.stringify(object));
   // Test slow case.
@@ skipping 458 matching lines @@
 
 var result = JSON.parse('{"foo":0,"bar":1}', reviver);
 assertEquals({foo: 0, bar: proxy}, result);
 assertSame(result.bar, proxy);
 assertEquals(3, log.length);
 for (var i in log) assertSame(target, log[i][1]);
 
 assertEquals(["get", target, "length", proxy], log[0]);
 assertEquals(["get", target, "0", proxy], log[1]);
 assertEquals(["deleteProperty", target, "0"], log[2]);