Remove support for Object.observe

src/js/harmony-object-observe.js

Index: src/js/harmony-object-observe.js
diff --git a/src/js/harmony-object-observe.js b/src/js/harmony-object-observe.js
deleted file mode 100644
index 95dd298f0db45908e88fb22b2773e2fa956882ef..0000000000000000000000000000000000000000
--- a/src/js/harmony-object-observe.js
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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.
-
-(function(global, utils) {
-
-"use strict";
-
-%CheckIsBootstrapping();
-
-var ObserveArrayMethods = utils.ImportNow("ObserveArrayMethods");
-var ObserveObjectMethods = utils.ImportNow("ObserveObjectMethods");;
-
-utils.InstallFunctions(global.Object, DONT_ENUM, ObserveObjectMethods);
-utils.InstallFunctions(global.Array, DONT_ENUM, ObserveArrayMethods);
-
-})