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diff --git a/tools/addon-sdk-1.4/packages/api-utils/lib/environment.js b/tools/addon-sdk-1.4/packages/api-utils/lib/environment.js
deleted file mode 100644
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--- a/tools/addon-sdk-1.4/packages/api-utils/lib/environment.js
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@@ -1,86 +0,0 @@
-/* vim:set ts=2 sw=2 sts=2 expandtab */
-/* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Jetpack.
- *
- * The Initial Developer of the Original Code is Mozilla.
- * Portions created by the Initial Developer are Copyright (C) 2011
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Irakli Gozalishvili <gozala@mozilla.com> (Original Author)
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
-'use strict';
-
-const { Cc, Ci } = require('chrome');
-const { get, set, exists } = Cc['@mozilla.org/process/environment;1'].
- getService(Ci.nsIEnvironment);
-
-exports.env = Proxy.create({
- // XPCOM does not provides a way to enumerate environment variables, so we
- // just don't support enumeration.
- getPropertyNames: function() [],
- getOwnPropertyNames: function() [],
- enumerate: function() [],
- keys: function() [],
- // We do not support freezing, cause it would make it impossible to set new
- // environment variables.
- fix: function() undefined,
- // We present all environment variables as own properties of this object,
- // so we just delegate this call to `getOwnPropertyDescriptor`.
- getPropertyDescriptor: function(name) this.getOwnPropertyDescriptor(name),
- // If environment variable with this name is defined, we generate proprety
- // descriptor for it, otherwise fall back to `undefined` so that for consumer
- // this property does not exists.
- getOwnPropertyDescriptor: function(name) {
- return !exists(name) ? undefined : {
- value: get(name),
- enumerable: false, // Non-enumerable as we don't support enumeration.
- configurable: true, // Configurable as it may be deleted.
- writable: true // Writable as we do support set.
- }
- },
-
- // New environment variables can be defined just by defining properties
- // on this object.
- defineProperty: function(name, { value }) set(name, value),
- delete: function(name) set(name, null),
-
- // We present all properties as own, there for we just delegate to `hasOwn`.
- has: function(name) this.hasOwn(name),
- // We do support checks for existence of an environment variable, via `in`
- // operator on this object.
- hasOwn: function(name) exists(name),
-
- // On property get / set we do read / write appropriate environment variables,
- // please note though, that variables with names of standard object properties
- // intentionally (so that this behaves as normal object) can not be
- // read / set.
- get: function(proxy, name) Object.prototype[name] || get(name) || undefined,
- set: function(proxy, name, value) Object.prototype[name] || set(name, value)
-});