cleanup: optimize imports

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameStateManager.java

@@ -86,7 +86,7 @@ class GameStateManager {
      * @return A list of applied events
      */
     public ArrayList<Event> apply() {
-        ArrayList<Event> toReturn = new ArrayList<Event>(queue.size());
+        ArrayList<Event> toReturn = new ArrayList<>(queue.size());
         Event current;
         while ((current = queue.poll()) != null) {
             GameLogic.applyEvent(state, current);