Obsolete workaround in test_transactions.py

Author: ajdavis

test/test_transactions.py

@@ -233,11 +233,6 @@ def check_events(self, test, listener, session_ids):
  if actual_time is not None:
  expected_read_concern['afterClusterTime'] = actual_time
 
- # TODO: Do not send writeConcern in transactions.
- if expectation[event_type]['command_name'] not in (
- 'commitTransaction', 'abortTransaction'):
- expected_cmd.pop('writeConcern', None)
-
  # Replace lsid with a name like "session0" to match test.
  if 'lsid' in event.command:
  for name, lsid in session_ids.items():