Issue #2080567 by mrsinguyen: Remove Unused local variable from...

Issue #2080567 by mrsinguyen: Remove Unused local variable  from /core/modules/comment/lib/Drupal/comment/Plugin/views/row/Rss.php.

core/modules/comment/lib/Drupal/comment/Plugin/views/row/Rss.php

@@ -56,7 +56,6 @@ public function buildOptionsForm(&$form, &$form_state) {
 
   public function preRender($result) {
     $cids = array();
-    $nids = array();
 
     foreach ($result as $row) {
       $cids[] = $row->cid;