Issue #2081163 by smiro, areke: Remove unused local variables from the datetime module.

core/modules/datetime/lib/Drupal/datetime/Plugin/Field/FieldWidget/DatetimeDatelistWidget.php

@@ -76,7 +76,6 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     switch ($this->getFieldSetting('datetime_type')) {
       case 'date':
         $storage_format = DATETIME_DATE_STORAGE_FORMAT;
-        $type_type = 'none';
         break;
 
       default: