Remove unused menu item types.

chrome/android/java/res/layout/four_button_menu_item.xml

Index: chrome/android/java/res/layout/four_button_menu_item.xml
diff --git a/chrome/android/java/res/layout/four_button_menu_item.xml b/chrome/android/java/res/layout/four_button_menu_item.xml
deleted file mode 100644
index 37843d525f4f04862fe36487cf95f7cef89a39cc..0000000000000000000000000000000000000000
--- a/chrome/android/java/res/layout/four_button_menu_item.xml
+++ /dev/null
@@ -1,46 +0,0 @@
-<?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.
--->
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="?android:attr/listPreferredItemHeightSmall"
-    android:layout_gravity="top|start"
-    android:orientation="horizontal">
-
-    <org.chromium.chrome.browser.widget.TintedImageButton
-        android:id="@+id/button_one"
-        android:layout_width="59dp"
-        android:layout_height="match_parent"
-        android:paddingEnd="11dp"
-        android:background="?attr/listChoiceBackgroundIndicator"
-        android:scaleType="center" />
-
-    <org.chromium.chrome.browser.widget.TintedImageButton
-        android:id="@+id/button_two"
-        android:layout_width="70dp"
-        android:layout_height="match_parent"
-        android:paddingStart="11dp"
-        android:paddingEnd="11dp"
-        android:background="?attr/listChoiceBackgroundIndicator"
-        android:scaleType="center" />
-
-    <org.chromium.chrome.browser.widget.TintedImageButton
-        android:id="@+id/button_three"
-        android:layout_width="70dp"
-        android:layout_height="match_parent"
-        android:paddingStart="11dp"
-        android:paddingEnd="11dp"
-        android:background="?attr/listChoiceBackgroundIndicator"
-        android:scaleType="center" />
-
-    <org.chromium.chrome.browser.widget.TintedImageButton
-        android:id="@+id/button_four"
-        android:layout_width="59dp"
-        android:layout_height="match_parent"
-        android:paddingStart="11dp"
-        android:background="?attr/listChoiceBackgroundIndicator"
-        android:scaleType="center" />
-</LinearLayout>