fix pre-commit issue

Author: pankaj-bind

examples/clients/simple-auth-client/mcp_simple_auth_client/main.py

@@ -132,7 +132,6 @@ def stop(self):
             self.thread.join(timeout=1)
         print("🛑 Stopped callback server.")
 
-
     def wait_for_callback(self, timeout=300):
         """Wait for OAuth callback with timeout."""
         start_time = time.time()