Updated runtime files.  Remove version checks for Vim older than 6.0.
diff --git a/runtime/syntax/esmtprc.vim b/runtime/syntax/esmtprc.vim
index b22b1a1..81f074b 100644
--- a/runtime/syntax/esmtprc.vim
+++ b/runtime/syntax/esmtprc.vim
@@ -3,11 +3,8 @@
 " Maintainer:	Kornel Kielczewski <kornel@gazeta.pl>
 " Last Change:	16 Feb 2005
 
-" For version 5.x: Clear all syntax items
-" For version 6.x: Quit when a syntax file was already loaded
-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