diff --git a/mozilla/dom/public/MANIFEST b/mozilla/dom/public/MANIFEST
index 200b7f20bb7..91567505e7a 100644
--- a/mozilla/dom/public/MANIFEST
+++ b/mozilla/dom/public/MANIFEST
@@ -31,7 +31,6 @@ nsIDOMScriptObjectFactory.h
 nsDOMCID.h
 nsDOMPropEnums.h
 nsDOMPropNames.h
-nsIScriptNameSetRegistry.h
 nsIScriptExternalNameSet.h
 nsIScriptNameSpaceManager.h
 nsDOMError.h
diff --git a/mozilla/dom/public/Makefile.in b/mozilla/dom/public/Makefile.in
index 2049a518b57..fbd31e9bdc3 100644
--- a/mozilla/dom/public/Makefile.in
+++ b/mozilla/dom/public/Makefile.in
@@ -46,7 +46,6 @@ EXPORTS=nsIScriptContext.h		\
 	nsDOMCID.h			\
 	nsDOMPropEnums.h		\
 	nsDOMPropNames.h		\
-	nsIScriptNameSetRegistry.h	\
 	nsIScriptExternalNameSet.h	\
 	nsIScriptNameSpaceManager.h	\
 	nsDOMError.h			\
diff --git a/mozilla/dom/public/makefile.win b/mozilla/dom/public/makefile.win
index 064e3891bbb..48e18e0894b 100644
--- a/mozilla/dom/public/makefile.win
+++ b/mozilla/dom/public/makefile.win
@@ -44,7 +44,6 @@ EXPORTS=nsIScriptContext.h		\
 	nsDOMCID.h			\
 	nsDOMPropEnums.h		\
 	nsDOMPropNames.h		\
-	nsIScriptNameSetRegistry.h	\
 	nsIScriptExternalNameSet.h	\
 	nsIScriptNameSpaceManager.h	\
 	nsDOMError.h			\
diff --git a/mozilla/dom/public/nsIScriptNameSetRegistry.h b/mozilla/dom/public/nsIScriptNameSetRegistry.h
deleted file mode 100644
index 9de37fad46b..00000000000
--- a/mozilla/dom/public/nsIScriptNameSetRegistry.h
+++ /dev/null
@@ -1,56 +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 1.1 (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/NPL/
- *
- * 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 Mozilla Communicator client code.
- *
- * The Initial Developer of the Original Code is Netscape Communications
- * Corporation.  Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s): 
- */
-
-#ifndef nsIScriptNameSetRegistry_h__
-#define nsIScriptNameSetRegistry_h__
-
-#include "nscore.h"
-#include "nsString.h"
-#include "nsISupports.h"
-
-#define NS_ISCRIPTNAMESETREGISTRY_IID                   \
- {0xa6cf90d9, 0x15b3, 0x11d2,                           \
- {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
-
-class nsIScriptContext;
-class nsIScriptExternalNameSet;
-
-/**
- * Interface used to add and remove name sets. These name sets
- * are asked to register themselves with a namespace registry
- * for every new script context.
- */
-class nsIScriptNameSetRegistry : public nsISupports {
-public:
-  NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISCRIPTNAMESETREGISTRY_IID);
-
-  /**
-   * Intialize classes associated with the name sets.
-   *
-   * @param aScriptContext the script context within which to initialize
-   * @result NS_OK if successful
-   */
-  NS_IMETHOD ResolveName(const nsAReadableString& aName,
-                         nsIScriptContext* aContext) = 0;
-};
-
-#endif /* nsIScriptNameSetRegistry_h__ */