fix tests -- i think when i rebased i did some funky stuff?

Author: sleepyStick

test/asynchronous/test_transactions.py

@@ -39,14 +39,9 @@
 from bson.raw_bson import RawBSONDocument
 from pymongo import WriteConcern, _csot
 from pymongo.asynchronous import client_session
-from pymongo.asynchronous.client_session import (
-    _BACKOFF_MAX,
-    TransactionOptions,
-    _set_backoff_initial,
-)
+from pymongo.asynchronous.client_session import TransactionOptions
 from pymongo.asynchronous.command_cursor import AsyncCommandCursor
 from pymongo.asynchronous.cursor import AsyncCursor
-from pymongo.asynchronous.helpers import anext
 from pymongo.errors import (
     AutoReconnect,
     CollectionInvalid,

test/test_transactions.py

@@ -50,14 +50,9 @@
 from pymongo.read_concern import ReadConcern
 from pymongo.read_preferences import ReadPreference
 from pymongo.synchronous import client_session
-from pymongo.synchronous.client_session import (
-    _BACKOFF_MAX,
-    TransactionOptions,
-    _set_backoff_initial,
-)
+from pymongo.synchronous.client_session import TransactionOptions
 from pymongo.synchronous.command_cursor import CommandCursor
 from pymongo.synchronous.cursor import Cursor
-from pymongo.synchronous.helpers import next
 
 _IS_SYNC = True