Remove unused group menu layout

<?xml version="1.0" encoding="utf-8"?>

<!-- Copyright (C) 2011 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0

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     distributed under the License is distributed on an "AS IS" BASIS,

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<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item

        android:id="@+id/menu_discard"

        android:alphabeticShortcut="q"

        android:title="@string/menu_discard"

        android:showAsAction="withText" />

</menu>