Issue #2080033 by royal121, mrsinguyen: Remove Unused local variable from...

Issue #2080033 by royal121, mrsinguyen: Remove Unused local variable  from /core/modules/views_ui/lib/Drupal/views_ui/Form/Ajax/Display.php.

core/modules/views_ui/lib/Drupal/views_ui/Form/Ajax/Display.php

@@ -61,7 +61,6 @@ public function getFormId() {
   public function buildForm(array $form, array &$form_state) {
     $view = $form_state['view'];
     $display_id = $form_state['display_id'];
-    $section = $form_state['section'];
 
     $executable = $view->getExecutable();
     $executable->setDisplay($display_id);