Remove leftover header call

includes/lib/general.php

@@ -90,7 +90,7 @@ WHERE ec.serial = '%s'
   AND ec.disablelogin = 0
   AND UNIX_TIMESTAMP(ec.expire) > UNIX_TIMESTAMP()", mysql_real_escape_string($serial),
 		mysql_real_escape_string($issuer_cn), implode("', '", $addresses_for_sql));
-	header("Content-type: text/plain");
+
 	$res = mysql_query($query);
 	if ($res === false) {
 		trigger_error(sprintf("MySQL error %d: %s", mysql_errno(), mysql_error()));