MAPG-191 don't create separate variable for data where not necessary

src/Controller/GameController.php

@@ -21,15 +21,15 @@ class GameController
     public function getGame(): IContent
     {
         $mapId = (int) $this->request->query('mapId');
-        $data = $this->prepareGame($mapId);
-        return new HtmlContent('game', $data);
+
+        return new HtmlContent('game', $this->prepareGame($mapId));
     }
 
     public function getGameJson(): IContent
     {
         $mapId = (int) $this->request->query('mapId');
-        $data = $this->prepareGame($mapId);
-        return new JsonContent($data);
+
+        return new JsonContent($this->prepareGame($mapId));
     }
 
     private function prepareGame(int $mapId)