using System;

public class Program

{

    public static void Main()

    {

                        public class Bomb : MonoBehaviour

                {

​

                    void OnCollisionEnter(Collision collision)

                    {

                        Destroy(gameObject);

                        Debug.Log("ouch");

                    }

                }

​

    }

}

​

To destroy an object the player collides with, within the player script, use

Destroy(other.gameObject);  or  Destroy(collision.gameObject);