Revert "Add "own" symbols support."

test/mjsunit/own-symbols.js

Index: test/mjsunit/own-symbols.js
diff --git a/test/mjsunit/own-symbols.js b/test/mjsunit/own-symbols.js
deleted file mode 100644
index 588a032aa86c582380497f087649988910cd0750..0000000000000000000000000000000000000000
--- a/test/mjsunit/own-symbols.js
+++ /dev/null
@@ -1,55 +0,0 @@
-// 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: --allow-natives-syntax
-
-var s = %CreatePrivateOwnSymbol("s");
-var s1 = %CreatePrivateOwnSymbol("s1");
-
-function TestSimple() {
-  var p = {}
-  p[s] = "moo";
-
-  var o = Object.create(p);
-
-  assertEquals(undefined, o[s]);
-  assertEquals("moo", p[s]);
-
-  o[s] = "bow-wow";
-  assertEquals("bow-wow", o[s]);
-  assertEquals("moo", p[s]);
-}
-
-TestSimple();
-
-
-function TestICs() {
-  var p = {}
-  p[s] = "moo";
-
-
-  var o = Object.create(p);
-  o[s1] = "bow-wow";
-  function checkNonOwn(o) {
-    assertEquals(undefined, o[s]);
-    assertEquals("bow-wow", o[s1]);
-  }
-
-  checkNonOwn(o);
-
-  // Test monomorphic/optimized.
-  for (var i = 0; i < 1000; i++) {
-    checkNonOwn(o);
-  }
-
-  // Test non-monomorphic.
-  for (var i = 0; i < 1000; i++) {
-    var oNew = Object.create(p);
-    oNew["s" + i] = i;
-    oNew[s1] = "bow-wow";
-    checkNonOwn(oNew);
-  }
-}
-
-TestICs();