fix imports

Author: richvdh

synapse/storage/databases/main/events_worker.py

@@ -22,7 +22,6 @@
     Dict,
     Iterable,
     List,
-    NoReturn,
     Optional,
     Set,
     Tuple,

tests/handlers/test_federation_event.py

@@ -13,8 +13,6 @@
 # limitations under the License.
 from unittest import mock
 
-from parameterized import parameterized
-
 from synapse.events import make_event_from_dict
 from synapse.events.snapshot import EventContext
 from synapse.federation.transport.client import StateRequestResponse