Fix lint.

fed/api.py

@@ -488,6 +488,7 @@ def method(self, a):
 
     It can also be used with specific keyword arguments just same as ray options.
     """
+
     def _make_fed_remote(function_or_class, **options):
         if inspect.isfunction(function_or_class) or fed_utils.is_cython(
             function_or_class

fed/config.py

@@ -107,13 +107,13 @@ class CrossSiloMessageConfig:
         timeout_in_ms:
             The timeout in mili-seconds of a cross-silo RPC call. It's 60000 by
             default.
-        http_header: 
+        http_header:
             The HTTP header, e.g. metadata in grpc, sent with the RPC request.
             This won't override basic tcp headers, such as `user-agent`, but concat
             them together.
-        max_concurrency: 
+        max_concurrency:
             the max_concurrency of the sender/receiver proxy actor.
-        use_global_proxy: 
+        use_global_proxy:
             Whether using the global proxy actor or create new proxy actor for current
             job.
     """