diff --git a/mozilla/widget/public/nsui.h b/mozilla/widget/public/nsui.h
deleted file mode 100644
index 6fdc3cb089b..00000000000
--- a/mozilla/widget/public/nsui.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL.  You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation.  Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
- * Reserved.
- */
-#ifndef nsui_h___
-#define nsui_h___
-
-#ifdef _IMPL_NS_UI
-#define NS_UI NS_EXPORT
-#else
-#define NS_UI NS_IMPORT
-#endif
-
-#endif /* nsui_h___ */