remove userlink()

That was dead code; changes to lockedit and recentchanges removed the last
callers.

IkiWiki.pm

@@ -1125,23 +1125,6 @@ sub openiduser ($) {
 	return;
 }
 
-sub userlink ($) {
-	my $user=shift;
-
-	my $oiduser=eval { openiduser($user) };
-	if (defined $oiduser) {
-		return "<a href=\"$user\">$oiduser</a>";
-	}
-	else {
-		eval q{use CGI 'escapeHTML'};
-		error($@) if $@;
-
-		return htmllink("", "", escapeHTML(
-			length $config{userdir} ? $config{userdir}."/".$user : $user
-		), noimageinline => 1);
-	}
-}
-
 sub htmlize ($$$$) {
 	my $page=shift;
 	my $destpage=shift;