Issue #2081215 by mrsinguyen: Remove Unused local variable from...

Issue #2081215 by mrsinguyen: Remove Unused local variable  from /core/modules/views/lib/Drupal/views/Plugin/views/area/TokenizeAreaPluginBase.php.

core/modules/views/lib/Drupal/views/Plugin/views/area/TokenizeAreaPluginBase.php

@@ -55,7 +55,7 @@ public function tokenForm(&$form, &$form_state) {
     }
 
     $count = 0; // This lets us prepare the key as we want it printed.
-    foreach ($this->view->display_handler->getHandlers('argument') as $arg => $handler) {
+    foreach ($this->view->display_handler->getHandlers('argument') as $handler) {
       $options[t('Arguments')]['%' . ++$count] = t('@argument title', array('@argument' => $handler->adminLabel()));
       $options[t('Arguments')]['!' . $count] = t('@argument input', array('@argument' => $handler->adminLabel()));
     }