Updated runtime files.  Remove version checks for Vim older than 6.0.
diff --git a/runtime/syntax/sgmllnx.vim b/runtime/syntax/sgmllnx.vim
index 28224f6..7fd633d 100644
--- a/runtime/syntax/sgmllnx.vim
+++ b/runtime/syntax/sgmllnx.vim
@@ -3,11 +3,8 @@
 " Maintainer:	SungHyun Nam <goweol@gmail.com>
 " Last Change:	2013 May 13
 
-" 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
 
@@ -36,31 +33,23 @@
 syn region sgmllnxDocType start=+<!doctype+ end=+>+
 
 " Define the default highlighting.
-" For version 5.7 and earlier: only when not done already
-" For version 5.8 and later: only when an item doesn't have highlighting yet
-if version >= 508 || !exists("did_sgmllnx_syn_inits")
-  if version < 508
-    let did_sgmllnx_syn_inits = 1
-    command -nargs=+ HiLink hi link <args>
-  else
-    command -nargs=+ HiLink hi def link <args>
-  endif
+" Only when an item doesn't have highlighting yet
+command -nargs=+ HiLink hi def link <args>
 
-  HiLink sgmllnxTag2	    Function
-  HiLink sgmllnxTagN2	    Function
-  HiLink sgmllnxTag	    Special
-  HiLink sgmllnxEndTag	    Special
-  HiLink sgmllnxParen	    Special
-  HiLink sgmllnxEntity	    Type
-  HiLink sgmllnxDocEnt	    Type
-  HiLink sgmllnxTagName	    Statement
-  HiLink sgmllnxComment	    Comment
-  HiLink sgmllnxSpecial	    Special
-  HiLink sgmllnxDocType	    PreProc
-  HiLink sgmllnxTagError    Error
+HiLink sgmllnxTag2	    Function
+HiLink sgmllnxTagN2	    Function
+HiLink sgmllnxTag	    Special
+HiLink sgmllnxEndTag	    Special
+HiLink sgmllnxParen	    Special
+HiLink sgmllnxEntity	    Type
+HiLink sgmllnxDocEnt	    Type
+HiLink sgmllnxTagName	    Statement
+HiLink sgmllnxComment	    Comment
+HiLink sgmllnxSpecial	    Special
+HiLink sgmllnxDocType	    PreProc
+HiLink sgmllnxTagError    Error
 
-  delcommand HiLink
-endif
+delcommand HiLink
 
 let b:current_syntax = "sgmllnx"