Improve exitDoor script

Assets/Scripts/src/Wall/ExitDoor.cs

@@ -1,5 +1,6 @@
 using System;
 using src.Base;
+using src.Helpers;
 using src.Managers;
 using UnityEngine;
 
@@ -8,12 +9,10 @@ namespace src.Wall
     public class ExitDoor : GameplayComponent
     {
         private GameManager _gameManager;
-        private Collider2D _collider2D;
 
         private void Start()
         {
             _gameManager = GameManager.instance;
-            _collider2D = GetComponent<Collider2D>();
         }
 
         /* Trigger the next level and destroy itself. */