Fix PHPCS errors.

src/Plugin/Action/AbstractGenerateDerivativeMediaFile.php

@@ -5,6 +5,7 @@ namespace Drupal\islandora\Plugin\Action;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Url;
+
 /**
  * Emits a Node for generating derivatives event.
  *