Updated runtime files.  Remove version checks for Vim older than 6.0.
diff --git a/runtime/syntax/snnsres.vim b/runtime/syntax/snnsres.vim
index 4c1d596..2d27916 100644
--- a/runtime/syntax/snnsres.vim
+++ b/runtime/syntax/snnsres.vim
@@ -8,9 +8,8 @@
 " SNNS http://www-ra.informatik.uni-tuebingen.de/SNNS/
 " is a simulator for neural networks.
 
-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
 
@@ -37,23 +36,16 @@
 syn match	snnsresComment	"#.*$" contains=snnsresTodo
 syn keyword	snnsresTodo	TODO XXX FIXME contained
 
-if version >= 508 || !exists("did_snnsres_syn_inits")
-  if version < 508
-    let did_snnsres_syn_inits = 1
-    command -nargs=+ HiLink hi link <args>
-  else
-    command -nargs=+ HiLink hi def link <args>
-  endif
+command -nargs=+ HiLink hi def link <args>
 
-  HiLink snnsresGen		Statement
-  HiLink snnsresHeader		Statement
-  HiLink snnsresNoHeader	Define
-  HiLink snnsresNumbers		Number
-  HiLink snnsresComment		Comment
-  HiLink snnsresTodo		Todo
+HiLink snnsresGen		Statement
+HiLink snnsresHeader		Statement
+HiLink snnsresNoHeader	Define
+HiLink snnsresNumbers		Number
+HiLink snnsresComment		Comment
+HiLink snnsresTodo		Todo
 
-  delcommand HiLink
-endif
+delcommand HiLink
 
 let b:current_syntax = "snnsres"