message: [slice] Removing deprecated argument
diff: @@ -229,12 +229,9 @@ class Slice(Model, AuditMixinNullable, ImportMixin):
  name = escape(self.slice_name)
  return Markup('<a href="{url}">{name}</a>'.format(**locals()))
  - def get_viz(self, url_params_multidict=None):
  + def get_viz(self):
  """Creates :py:class:viz.BaseViz object from the url_params_multidict.
  - :param werkzeug.datastructures.MultiDict url_params_multidict:
  - Contains the visualization params, they override the self.params
  - stored in the database
  :return: object of the 'viz_type' type that is taken from the
  url_params_multidict or self.params.
  :rtype: :py:class:viz.BaseViz
  