@utilities.arguments_not_none<EOL><INDENT>def remove_root_catalog(self, catalog_id):<DEDENT>
<EOL>if self._catalog_session is not None:<EOL><INDENT>return self._catalog_session.remove_root_catalog(catalog_id=catalog_id)<EOL><DEDENT>return self._hierarchy_session.remove_root(id_=catalog_id)<EOL>
Removes a root catalog.

        arg:    catalog_id (osid.id.Id): the ``Id`` of a catalog
        raise:  NotFound - ``catalog_id`` is not a root
        raise:  NullArgument - ``catalog_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure occurred
        *compliance: mandatory -- This method must be implemented.*