adjust vim syntax file: `fastcgi param' is not deprecated

Only a server-level bare `param' is (and in hindsight it was just
a terrible idea to add it in the first place.)

contrib/vim/syntax/gmid.vim

@@ -51,7 +51,6 @@ syn cluster gmidValues contains=gmidNumber,
 " TODO: write comprehensive syntax rules so it can be checked with:
 " syn match gmidError '.'
 syn keyword gmidDeprecated ipv6 nextgroup=gmidBoolean skipwhite
-syn match   gmidDeprecated "\<fastcgi\s\+param\>" display
 
 " Comments: {{{2
 " =========