ui-shared: exploit snapshot dwimmery in cgit_print_snapshot_links

Since we know that ui-snapshot.c is able to extract the revision from the
filename, there's no longer necessary to specify the revision with a 'id'
querystring argument.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-shared.c

@@ -707,8 +707,7 @@ void cgit_print_snapshot_links(const char *repo, const char *head,
 			continue;
 		filename = fmt("%s-%s%s", cgit_repobasename(repo), hex,
 			       f->suffix);
-		cgit_snapshot_link(filename, NULL, NULL, (char *)head,
-				   (char *)hex, filename);
+		cgit_snapshot_link(filename, NULL, NULL, NULL, NULL, filename);
 		html("<br/>");
 	}
 }