Delete the now-obsolete ChromeMainDelegateStagingAndroid.

chrome/browser/android/chrome_main_delegate_staging_android.cc

Index: chrome/browser/android/chrome_main_delegate_staging_android.cc
diff --git a/chrome/browser/android/chrome_main_delegate_staging_android.cc b/chrome/browser/android/chrome_main_delegate_staging_android.cc
deleted file mode 100644
index 2771efffac46e0ac19990e4651020937ee6aaa6f..0000000000000000000000000000000000000000
--- a/chrome/browser/android/chrome_main_delegate_staging_android.cc
+++ /dev/null
@@ -1,11 +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 "chrome/browser/android/chrome_main_delegate_staging_android.h"
-
-ChromeMainDelegateStagingAndroid::ChromeMainDelegateStagingAndroid() {
-}
-
-ChromeMainDelegateStagingAndroid::~ChromeMainDelegateStagingAndroid() {
-}