remove unnecessary whitespace

Author: Zsailer

jupyter_client/manager.py

@@ -485,7 +485,6 @@ async def _async_shutdown_kernel(self, now: bool = False, restart: bool = False)
 
         await ensure_async(self.cleanup_resources(restart=restart))
 
-
     shutdown_kernel = run_sync(_async_shutdown_kernel)
 
     async def _async_restart_kernel(self, now: bool = False, newports: bool = False, **kw) -> None: