Attribute mac address

gns3server/modules/base_manager.py

@@ -49,13 +49,6 @@ class BaseManager:
             cls._instance = cls()
         return cls._instance
 
-    def __del__(self):
-        self.destroy()
-
-    def destroy():
-        """Cleanup the VMS. Call this before closing the server"""
-        cls._instance()
-
     @property
     def module_name(self):
         """