diff --git a/include/csid.h b/include/csid.h
deleted file mode 100644
index c492e031d7f6..000000000000
--- a/include/csid.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/* -*- Mode: C; tab-width: 4; 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.org 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): 
- */
-
-
-/*	csid.h	*/
-
-#ifndef _CSID_H_
-#define _CSID_H_
-
-/* Codeset type */
-#define SINGLEBYTE   0x0000 /* 0000 0000 0000 0000 =    0 */
-#define MULTIBYTE    0x0100 /* 0000 0001 0000 0000 =  256 */
-
-/* Code Set IDs */
-/* CS_DEFAULT: used if no charset param in header */
-/* CS_UNKNOWN: used for unrecognized charset */
-
-                    /* type                  id   */
-#define CS_DEFAULT    (SINGLEBYTE         |   0) /*    0 */
-#define CS_UTF8       (MULTIBYTE          |  34) /*  290 */
-#define CS_UNKNOWN    (SINGLEBYTE         | 255) /* 255 */
-
-#endif /* _CSID_H_ */