ISTWCMS-5204: removing extra ? in function call

src/Service/UWServiceInterface.php

@@ -38,7 +38,7 @@ interface UWServiceInterface {
    * @return array
    *   Array with details for responsive image.
    */
-  public function prepareResponsiveImage(?EntityInterface $entity, string $image_style): array;
+  public function prepareResponsiveImage(EntityInterface $entity, string $image_style): array;
 
   /**
    * Get the UW images styles used in UW responsive image.