(EXTRA_DIST): Remove mux.proto.

doc/Makefile.am

-# $Id: Makefile.am,v 1.11 1999/04/04 20:59:34 ceder Exp $
+# $Id: Makefile.am,v 1.12 1999/04/28 22:05:31 ceder Exp $
 # Copyright (C) 1998  Lysator Academic Computer Association.
 #
 # This file is part of the LysKOM server.
@@ -41,7 +41,6 @@ EXTRA_DIST = ADMINISTRATION misc_items	\
 	disc-cache.spec \
 	local-to-global.doc \
 	lyskomd-database-format \
-	mux.proto \
 	prot-A-english.txt \
 	security-levels.txt