old_contents: from south.modelsinspector import add_introspection_rules
  add_introspection_rules([], ["^geoposition\.fields\.GeopositionField"])
  
new_contents: try:
      from south.modelsinspector import add_introspection_rules
      add_introspection_rules([], ["^geoposition\.fields\.GeopositionField"])
  except ImportError:
      pass
  
subject: Remove south dependency.