diff --git a/mozilla/layout/html/base/src/nsIHTMLFrameType.h b/mozilla/layout/html/base/src/nsIHTMLFrameType.h
deleted file mode 100644
index c009fae04f0..00000000000
--- a/mozilla/layout/html/base/src/nsIHTMLFrameType.h
+++ /dev/null
@@ -1,41 +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 nsIHTMLFrameType_h___
-#define nsIHTMLFrameType_h___
-
-#include "nsISupports.h"
-
-enum nsHTMLFrameType {
-  eHTMLFrame_Block,
-};
-
-// Interface for nsIHTMLFrameType
-#define NS_IHTMLFRAMETYPE_IID                \
-{ /* 0e2554e0-b2c8-11d1-9328-00805f8add32 */ \
-  0x0e2554e0, 0xb2c8, 0x11d1,                \
-    {0x93, 0x28, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
-
-// IHTMLFrameType interface. Note that this interface is not an
-// nsISupports interface and therefore you cannot queryinterface back
-// to the original object.
-class nsIHTMLFrameType {
-public:
-  virtual nsHTMLFrameType GetFrameType() const = 0;
-};
-
-#endif /* nsIHTMLFrameType_h___ */