fix: remove saving on serve shutdown

saving should only happen on server save to avoid unnessasery double saves

Author: RebeccaStevens

src/AutoCode.cs

@@ -45,11 +45,6 @@ void OnServerSave()
       data.Save();
     }
 
-    void OnServerShutdown()
-    {
-      Unload();
-    }
-
     void Unload()
     {
       RemoveAllTempCodeLocks();