Slight simplification.

src/ImageDiscovery.php

@@ -11,20 +11,13 @@
  */
 class ImageDiscovery implements ImageDiscoveryInterface {
 
-  /**
-   * The event dispatcher service.
-   *
-   * @var \Symfony\Contracts\EventDispatcher\EventDispatcherInterface
-   */
-  protected EventDispatcherInterface $eventDispatcher;
-
   /**
    * Constructor.
    */
   public function __construct(
-    EventDispatcherInterface $event_dispatcher,
+    protected EventDispatcherInterface $eventDispatcher,
   ) {
-    $this->eventDispatcher = $event_dispatcher;
+    // No-op, other than setting property.
   }
 
   /**