global: remove functionality we deprecated for cgit v1.0

The man page states these were deprecated for v1.0. We are past v1.1,
so remove the functionality.

Signed-off-by: Christian Hesse <mail@eworm.de>
Reviewed-by: John Keeping <john@keeping.me.uk>

ui-shared.c

@@ -977,8 +977,6 @@ static void print_header(void)
 	} else {
 		if (ctx.cfg.root_desc)
 			html_txt(ctx.cfg.root_desc);
-		else if (ctx.cfg.index_info)
-			html_include(ctx.cfg.index_info);
 	}
 	html("</td></tr></table>\n");
 }