Updated runtime files. Remove version checks for Vim older than 6.0.

runtime/syntax/icemenu.vim

@@ -6,10 +6,8 @@
 " Comment:	Icewm is a lightweight window manager.  This adds syntax
 "		highlighting when editing your user's menu file (~/.icewm/menu).
 
-" clear existing syntax
-if version < 600
-	syntax clear
-elseif exists("b:current_syntax")
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
 	finish
 endif