remove custom serializer and adjust annotations of news item entity

src/Bundle/ChillMainBundle/Entity/NewsItem.php

@@ -44,7 +44,7 @@ class NewsItem implements TrackCreationInterface, TrackUpdateInterface
     /**
      * @ORM\Column(type="text")
      *
-     * @Groups({"read", "write"})
+     * @Groups({"read"})
      *
      * @Assert\NotBlank
      *
@@ -55,7 +55,7 @@ class NewsItem implements TrackCreationInterface, TrackUpdateInterface
     /**
      * @ORM\Column(type="text")
      *
-     * @Groups({"read", "write"})
+     * @Groups({"read"})
      *
      * @Assert\NotBlank
      *

src/Bundle/ChillMainBundle/Serializer/Normalizer/NewsItemNormalizer.php

@@ -1,35 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-/*
- * Chill is a software for social workers
- *
- * For the full copyright and license information, please view
- * the LICENSE file that was distributed with this source code.
- */
-
-namespace Chill\MainBundle\Serializer\Normalizer;
-
-use Chill\MainBundle\Entity\NewsItem;
-use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
-
-class NewsItemNormalizer implements NormalizerInterface
-{
-    public function normalize($newsItem, $format = null, array $context = [])
-    {
-        /* @var NewsItem $newsItem */
-        return [
-            'id' => $newsItem->getId(),
-            'title' => $newsItem->getTitle(),
-            'content' => $newsItem->getContent(),
-            'startdate' => $newsItem->getStartDate(),
-            'enddate' => $newsItem->getEndDate(),
-        ];
-    }
-
-    public function supportsNormalization($data, $format = null): bool
-    {
-        return $data instanceof NewsItem && 'json' === $format;
-    }
-}