UnityEngine.EventSystems.RaycasterManager.RemoveRaycasters C# (CSharp) Method

        public static void RemoveRaycasters(BaseRaycaster baseRaycaster)
        {
            if (s_Raycasters.Contains(baseRaycaster))
            {
                s_Raycasters.Remove(baseRaycaster);
            }
        }
    }

 protected override void OnDisable()
 {
     RaycasterManager.RemoveRaycasters(this);
     base.OnDisable();
 }