Remove crappy old SMF code which appended PHPSESSID to urls despite PHP has that shit disabled

Sources/Subs.php

@@ -1533,7 +1533,7 @@ function obExit($do_header = null, $do_footer = null, $from_index = false)
 	if ($do_header)
 	{
 		// Start up the session URL fixer.
-		ob_start('ob_sessrewrite');
+		#ob_start('ob_sessrewrite');
 
 		// Display the screen in the logical order.
 		template_header();