Remove WebIDE devtools component.

This resolves #1123

devtools/client/webide/modules/moz.build

@@ -1,21 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DevToolsModules(
-    'addons.js',
-    'app-manager.js',
-    'app-projects.js',
-    'app-validator.js',
-    'build.js',
-    'config-view.js',
-    'project-list.js',
-    'runtime-list.js',
-    'runtimes.js',
-    'simulator-process.js',
-    'simulators.js',
-    'tab-store.js',
-    'utils.js'
-)