Fix coding standards

Author: aspark21

block_my_feedback.php

@@ -144,7 +144,6 @@ public static function fetch_marking(stdClass $user): ?array {
                     $cmid = $summative->cmid;
                     $mod = $modinfo->get_cm($cmid);
 
-
                     // Skip hidden mods.
                     if (!$mod->visible) {
                         continue;