Updated runtime files. Remove HiLink commands.
diff --git a/runtime/syntax/grads.vim b/runtime/syntax/grads.vim
index 0f09483..50be14b 100644
--- a/runtime/syntax/grads.vim
+++ b/runtime/syntax/grads.vim
@@ -51,25 +51,23 @@
" Define the default highlighting.
" Only when an item doesn't hgs highlighting+yet
-command -nargs=+ HiLink hi def link <args>
-HiLink gradsStatement Statement
+hi def link gradsStatement Statement
-HiLink gradsString String
-HiLink gradsNumber Number
+hi def link gradsString String
+hi def link gradsNumber Number
-HiLink gradsFixVariables Special
-HiLink gradsVariables Identifier
-HiLink gradsglobalVariables Special
-HiLink gradsConst Special
+hi def link gradsFixVariables Special
+hi def link gradsVariables Identifier
+hi def link gradsglobalVariables Special
+hi def link gradsConst Special
-HiLink gradsClassMethods Function
+hi def link gradsClassMethods Function
-HiLink gradsOperator Operator
-HiLink gradsComment Comment
+hi def link gradsOperator Operator
+hi def link gradsComment Comment
-HiLink gradsTypos Error
+hi def link gradsTypos Error
-delcommand HiLink
let b:current_syntax = "grads"