Revert of Introduce AndroidFocusRules and NativeWidgetAndroid

ui/views/controls/menu/menu_config_android.cc

Index: ui/views/controls/menu/menu_config_android.cc
diff --git a/ui/views/controls/menu/menu_config_android.cc b/ui/views/controls/menu/menu_config_android.cc
deleted file mode 100644
index 9f5c73f7addc941b38da8506e13408b103cd552a..0000000000000000000000000000000000000000
--- a/ui/views/controls/menu/menu_config_android.cc
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2015 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.
-
-#include "ui/views/controls/menu/menu_config.h"
-
-namespace views {
-
-void MenuConfig::Init() {
-  // Android uses the config provided by data member initializers.
-}
-
-}  // namespace views