diff --git a/dom/public/idl/html/nsIDOMNSHTMLOptionCollection.idl b/dom/public/idl/html/nsIDOMNSHTMLOptionCollection.idl
deleted file mode 100644
index 7b6ac8607c1e..000000000000
--- a/dom/public/idl/html/nsIDOMNSHTMLOptionCollection.idl
+++ /dev/null
@@ -1,31 +0,0 @@
-/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (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.mozilla.org/MPL/
- * 
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- * 
- * The Original Code is the Mozilla browser.
- * 
- * The Initial Developer of the Original Code is Netscape
- * Communications, Inc.  Portions created by Netscape are
- * Copyright (C) 1999, Mozilla.  All Rights Reserved.
- * 
- * Contributor(s):
- */
-
-#include "domstubs.idl"
-
-[scriptable, uuid(a6cf9114-15b3-11d2-932e-00805f8add32)]
-interface nsIDOMNSHTMLOptionCollection : nsISupports
-{
-
-            attribute  unsigned long        length;
-            attribute  long                 selectedIndex;
-};
-