Remove explicit inherits from object

tests/helpers/collection_utils.py

@@ -6,7 +6,7 @@ import tempfile
 from anki import Collection
 
 
-class CollectionUtils(object):
+class CollectionUtils:
     """
     Provides utility methods for creating, inspecting and manipulating anki
     collections.

tests/helpers/mock_servers.py

@@ -4,7 +4,7 @@ import logging
 from anki.sync import HttpSyncer, RemoteServer, RemoteMediaServer
 
 
-class MockServerConnection(object):
+class MockServerConnection:
     """
     Mock for HttpSyncer's con attribute, a httplib2 connection. All requests
     that would normally got to the remote server will be redirected to our