Wrap JSON serialization for any kind of visit in Visit entity itself

module/Core/src/Visit/Transformer/OrphanVisitDataTransformer.php

@@ -1,19 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Shlinkio\Shlink\Core\Visit\Transformer;
-
-use Shlinkio\Shlink\Common\Rest\DataTransformerInterface;
-use Shlinkio\Shlink\Core\Visit\Entity\Visit;
-
-class OrphanVisitDataTransformer implements DataTransformerInterface
-{
-    /**
-     * @param Visit $visit
-     */
-    public function transform($visit): array // phpcs:ignore
-    {
-        return $visit->jsonSerialize();
-    }
-}