Remove a bunch of stuff in //mojo

mojo/build/package_app.gypi

-# Copyright (c) 2013 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-{
-  'type': 'none',
-  'dependencies': [
-    '<(app_name)',
-  ],
-  'conditions': [
-    ['OS=="android"', {
-      'variables': {
-        'mojo_app_dir': '<(PRODUCT_DIR)/apps',
-        'source_binary': '<(PRODUCT_DIR)/<(SHARED_LIB_PREFIX)<(app_name)<(SHARED_LIB_SUFFIX)',
-        'target_binary': '<(mojo_app_dir)/<(SHARED_LIB_PREFIX)<(app_name)<(SHARED_LIB_SUFFIX)',
-      },
-      'actions': [{
-        'action_name': 'strip',
-        'inputs': [ '<(source_binary)', ],
-        'outputs': [ '<(target_binary)', ],
-        'action': [
-          '<(android_strip)',
-          '<@(_inputs)',
-          '--strip-unneeded',
-          '-o',
-          '<@(_outputs)',
-        ],
-      }],
-    }],
-  ],
-}