test_rpc_client: Fix flake8 warnings

swh/core/api/tests/test_rpc_client.py

@@ -30,20 +30,24 @@ class ReraiseException(Exception):
 def rpc_client_class(requests_mock):
     class TestStorage:
         @remote_api_endpoint("test_endpoint_url")
-        def test_endpoint(self, test_data, db=None, cur=None): ...
+        def test_endpoint(self, test_data, db=None, cur=None):
+            pass
 
         @remote_api_endpoint("path/to/endpoint")
-        def something(self, data, db=None, cur=None): ...
+        def something(self, data, db=None, cur=None):
+            pass
 
         @remote_api_endpoint("serializer_test")
-        def serializer_test(self, data, db=None, cur=None): ...
+        def serializer_test(self, data, db=None, cur=None):
+            pass
 
         @remote_api_endpoint("overridden/endpoint")
         def overridden_method(self, data):
             return "foo"
 
         @remote_api_endpoint("request_too_large")
-        def request_too_large(self, data, db=None, cur=None): ...
+        def request_too_large(self, data, db=None, cur=None):
+            pass
 
     class Testclient(RPCClient):
         backend_class = TestStorage