Fix formatting

Signed-off-by: Sreekanth <prsreekanth920@gmail.com>

Author: BulkBeing

packages/pynumaflow/pynumaflow/sinker/async_server.py

@@ -173,7 +173,6 @@ async def _watch_for_shutdown():
         shutdown_task = asyncio.create_task(_watch_for_shutdown())
         await server.wait_for_termination()
 
-
         # Propagate error so start() can exit with a non-zero code
         self._error = self.servicer._error