The class AnimeDb\Bundle\CatalogBundle\Entity\Type is declared but never used. You should remove the use statement.
use Doctrine\Bundle\DoctrineBundle\Registry;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use AnimeDb\Bundle\CatalogBundle\Entity\Item;
use AnimeDb\Bundle\CatalogBundle\Entity\Name;
use AnimeDb\Bundle\CatalogBundle\Entity\Source;
use AnimeDb\Bundle\CatalogBundle\Entity\Type;
use AnimeDb\Bundle\CatalogBundle\Entity\Genre;
use AnimeDb\Bundle\CatalogBundle\Entity\Studio;
use AnimeDb\Bundle\CatalogBundle\Entity\Image;
use AnimeDb\Bundle\AppBundle\Entity\Field\Image as ImageField;
use AnimeDb\Bundle\ShikimoriFillerBundle\Form\Filler as FillerForm;
in src/Service/Filler.php, line 20