Remove unexpected using.

Assets/Cryville/Crtr/Popup.cs

@@ -1,5 +1,4 @@
 using System;
-using UnityEditor.VersionControl;
 using UnityEngine;
 using UnityEngine.UI;
 
@@ -27,7 +26,6 @@ namespace Cryville.Crtr {
 			timer += Time.deltaTime;
 		}
 
-
 		public static void CreateException(Exception ex) {
 			Create(ex.Message);
 		}