fix: code cleanup

src/test/java/uulm/teamname/marvelous/gamelibrary/json/ingame/EntityDeserializerTest.java

@@ -96,7 +96,7 @@ class EntityDeserializerTest {
                     "position": [12357, 1371113]
                 }
                 """;
-        assertThat((Rock) mapper.readValue(jsonRepresentingRock, Rock.class))
+        assertThat(mapper.readValue(jsonRepresentingRock, Rock.class))
                 .isEqualTo(rock);
     }
 
@@ -258,4 +258,4 @@ class EntityDeserializerTest {
             characterName.setLength(0); // empty the StringBuilder
         }
     }
-}
+}