Remove RCSId; this produces annoying warnings.

This is already removed from Expat 1.95.4, so the problem will not
recur when we update.

Modules/expat/xmlrole.c

@@ -3,9 +3,6 @@ Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
 See the file COPYING for copying permission.
 */
 
-static char RCSId[]
-  = "$Header$";
-
 #ifdef COMPILED_FROM_DSP
 #  include "winconfig.h"
 #else