diff --git a/dom/interfaces/core/nsIDOMDOMLocator.idl b/dom/interfaces/core/nsIDOMDOMLocator.idl
deleted file mode 100644
index 7426b4624f9b..000000000000
--- a/dom/interfaces/core/nsIDOMDOMLocator.idl
+++ /dev/null
@@ -1,24 +0,0 @@
-/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "domstubs.idl"
-
-/**
- * The nsIDOMDOMLocator interface provides location information for an error
- *
- * For more information on this interface please see
- * http://www.w3.org/TR/2002/WD-DOM-Level-3-Core-20020409/core.html
- */
-
-[scriptable, uuid(8053a5cb-7266-45ec-a31d-788db55bcdef)]
-interface nsIDOMDOMLocator : nsISupports
-{
-  readonly attribute long            lineNumber;
-  readonly attribute long            columnNumber;
-  readonly attribute long            offset;
-  readonly attribute nsIDOMNode      errorNode;
-  readonly attribute DOMString       uri;
-};
-