Cleanup: Remove unneeded includes of notification_registrar.h.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/6309018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72874 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_startup_browsertest.cc b/chrome/browser/extensions/extension_startup_browsertest.cc
index 25bad91..961c7a34 100644
--- a/chrome/browser/extensions/extension_startup_browsertest.cc
+++ b/chrome/browser/extensions/extension_startup_browsertest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -17,7 +17,6 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/notification_details.h"
 #include "chrome/common/notification_observer.h"
-#include "chrome/common/notification_registrar.h"
 #include "chrome/common/notification_type.h"
 #include "chrome/test/in_process_browser_test.h"
 #include "chrome/test/ui_test_utils.h"