remove __del__() from AsyncDiskClient

yndx_disk/clients/async_client.py

@@ -84,9 +84,6 @@ class AsyncDiskClient:
         loop = asyncio.new_event_loop()
         loop.run_until_complete(self.session.close())
 
-    def __del__(self) -> None:
-        self._cleanup()
-
     async def _wait_for_operation_to_finish(self, operation_id: str) -> bool:
         """
         Wait for an operation to finish.