[Remoting Android] Remove Cardboard Code

remoting/android/java/res/menu/desktop_actionbar.xml

 <?xml version="1.0" encoding="utf-8"?>
 
 <!-- Copyright 2014 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.
 -->
 
 <!--Action bar buttons for the Android app's remote desktop viewer-->
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item android:id="@+id/actionbar_trackpad_mode"
             android:title="@string/select_trackpad_mode"
             android:icon="@drawable/ic_mouse"
             app:showAsAction="ifRoom"/>
     <item android:id="@+id/actionbar_touch_mode"
             android:title="@string/select_touch_mode"
             android:icon="@drawable/ic_touch"
             app:showAsAction="ifRoom"/>
     <item android:id="@+id/actionbar_keyboard"
             android:title="@string/show_hide_keyboard"
             android:icon="@drawable/ic_action_keyboard"
             app:showAsAction="ifRoom"/>
     <item android:id="@+id/actionbar_hide"
             android:title="@string/full_screen"
             android:icon="@drawable/ic_action_full_screen"
             app:showAsAction="ifRoom"/>
     <item android:id="@+id/actionbar_send_ctrl_alt_del"
             android:title="@string/send_ctrl_alt_del"
             app:showAsAction="withText"/>
-    <item android:id="@+id/actionbar_cardboard"
-            android:title="@string/show_cardboard"
-            android:icon="@drawable/ic_cardboard"
-            app:showAsAction="never"/>
     <item android:id="@+id/actionbar_disconnect"
             android:title="@string/disconnect_myself_button"
             app:showAsAction="withText"/>
     <!--
         The Help option must be the final menu item and it must only appear in
         the action-bar overflow menu.
     -->
     <item android:id="@+id/actionbar_help"
             android:title="@string/actionbar_help"
             app:showAsAction="never"/>
 </menu>