Remove ifdef here since it is in the Editor directory

Author: mediumTaj

ThirdParty/FullSerializer/Editor/AotHelpers.cs

@@ -2,9 +2,7 @@
 using System.IO;
 using System.Reflection;
 using UnityEngine;
-#if UNITY_EDITOR
 using UnityEditor;
-#endif
 
 namespace FullSerializer
 {
@@ -71,4 +69,4 @@ public static void CleanAOT()
 
     }
 
-}
+}