Please flake8 by removing unused variable

Author: consideRatio

binderhub/launcher.py

@@ -243,7 +243,7 @@ def _cancel_ready_event(f=None):
                 else:
                     ready_event_future.cancel()
         try:
-            resp = await self.api_request(
+            await self.api_request(
                 'users/{}/servers/{}'.format(escaped_username, server_name),
                 method='POST',
                 body=json.dumps(data).encode('utf8'),