Variable is assigned but never used?

I've got a "warning" in my inspector saying that the variable "clone" is assigned but never used. The script is fairly simple (I'm iterating on it as I go) but essentially I've attached a public gameobject to the script which is the enemy prefab. I've been told never to work with the prefab directly and instead spawn another instance of the object so I can mess with it, destroy it do whatever and the prefab stays intact. As a result I decided to call my variable clone and instantiate it a varied number of times. Whenever I spawn an enemy there is a function that renames it to something unique so I can identify it so they aren't all called clone but I don't understand why it says the variable if never used is I'm spawning enemies with it.

The code is below how can I alter this to make the code more elegant / get rid of the warning. Basically I just want to Instantiate copies of my enemy prefab x amount of times. The actual enemy object takes care of identifying itself when it's spawned so is there a way to do it without even linking it to a gameobject at all? Thanks!

ERROR:
Assets/Scripts/EnemySpawn.cs(10,28): warning CS0414: The private field `EnemySpawn.clone' is assigned but its value is never used

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class EnemySpawn : MonoBehaviour {
5.  
6.     //Prefab associated with the script
7.     public GameObject enemy;
8.    
9.     //Clone of prefab so we can work with it
10.     private GameObject clone;
11.    
12.     //Tracks enemies spawned
13.     private int enemycount = 0;
14.    
15.     //Spawn Location
16.     private Vector3 spawnlocation = new Vector3(0,0,0);
17.    
18.     //Starts the Spawn co-routine
19.     void Start () {
20.         Spawn ();
21.     }
22.    
23.     //Spawns a new enemy even half second until 10 enemies are on screen.
24.     void Spawn () {
25.             if (enemycount < 10) {
26.             clone = Instantiate(enemy, spawnlocation, Quaternion.identity) as  GameObject;
27.             enemycount++;
28.             Invoke("Spawn", 0.5f);
29.         }
30.        
31.     }
32.     }

 

Instead of:

Code (csharp):

1.  
2. clone = Instantiate(enemy, spawnlocation, Quaternion.identity) as  GameObject;
3.  

Code (csharp):

1.  
2. Instantiate (enemy, spawnlocation, Quaternion.identity);
3.  

And delete your clone variable to get rid of the warning.

 

Thankyou good sir.