'Remove a role from a user and tenant pair.
Since we\'re trying to ignore the idea of user-only roles we\'re
not implementing them in hopes that the idea will die off.'

@controller.v2_deprecated
def remove_role_from_user(self, request, user_id, role_id, tenant_id=None):

    self.assert_admin(request)
    if (tenant_id is None):
        raise exception.NotImplemented(message=_('User    roles    not    supported:    tenant_id    required'))
    self.assignment_api.remove_role_from_user_and_project(user_id, tenant_id, role_id)
