  from django.contrib.gis import gdal
  from django.utils import six
  
  
  class SpatialRefSysMixin(object):
      """
      The SpatialRefSysMixin is a class used by the database-dependent
 
</s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six, translation
 </s> add from django.utils import translation </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.contrib.gis import gdal

  
  
  class SpatialRefSysMixin(object):
      """
      The SpatialRefSysMixin is a class used by the database-dependent
keep replace keep keep keep keep keep
 Refs #23919 -- Removed six.<various>_types usage

Thanks Tim Graham and Simon Charette for the reviews. 
django/contrib/gis/db/backends/base/models.py