  from django.conf import settings
  from django.core.checks import Warning
  from django.core.checks.urls import check_resolver
  from django.core.exceptions import ImproperlyConfigured
  from django.utils import lru_cache, six
  from django.utils.datastructures import MultiValueDict
  from django.utils.encoding import force_str, force_text
  from django.utils.functional import cached_property
  from django.utils.http import RFC3986_SUBDELIMS, urlquote
  from django.utils.regex_helper import normalize
 
</s> remove from django.utils import six, timezone
 </s> add from django.utils import timezone </s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six
 </s> add 
from django.utils import lru_cache
  from django.conf import settings
  from django.core.checks import Warning
  from django.core.checks.urls import check_resolver
  from django.core.exceptions import ImproperlyConfigured
from django.utils import lru_cache
  from django.utils.datastructures import MultiValueDict
  from django.utils.encoding import force_str, force_text
  from django.utils.functional import cached_property
  from django.utils.http import RFC3986_SUBDELIMS, urlquote
  from django.utils.regex_helper import normalize
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed six.<various>_types usage

Thanks Tim Graham and Simon Charette for the reviews. 
django/urls/resolvers.py