Im having trouble deleting a single game object from an array of game objects

I have spawner that spawns objects every 2 seconds and when the player cube moves over them I want the object that it moved over to be deleted from the array. I get all sorts of errors though.

• Code using UnityEngine; using System.Collections; using UnityEngine.UI;

public class Spawner : MonoBehaviour {

 public GameObject obstacle;
 public GameObject player;
 public int score;
 private float nextSpawn;
 private float spawnTime;
 public Text scoring;
 private GameObject obstacleDestroy;
 public GameObject[] obstacles;
 public int count;
 void Start ()
 {
     scoring.text = "Score: ";
     nextSpawn = 2;
 }





 void Update () {
     
     obstacles = GameObject.FindGameObjectsWithTag("Obstacle");
     scoring.text = "Score: " + score; 
     Vector3 position = new Vector3(this.transform.position.x,.1f,this.transform.position.z);
     for( int i = 0; i < obstacles.Length; i++)
     {
     obstacles[i] = obstacleDestroy;
     if (Time.time > spawnTime) 
     {
         
             spawnTime = Time.time + nextSpawn;
             obstacleDestroy = (GameObject)Instantiate(obstacle, position, this.transform.rotation);
             count += 1;
     }

     }

     if(obstacles[count -1] != null)
     {
         if(player.transform.position.x > obstacles[count - count].transform.position.x )
         {
             Destroy(obstacles[count - count + 1]);
             count -= 1;
             score += 1;
         }
     }

 }

}