def delete_role(self, name, mount_point=DEFAULT_MOUNT_POINT):
        """Delete an existing role by the given name.

        If the role does not exist, a 404 is returned.

        Supported methods:
            DELETE: /{mount_point}/roles/{name}. Produces: 204 (empty body)

        :param name: the name of the role to delete. This
            is part of the request URL.
        :type name: str | unicode
        :param mount_point: The "path" the method/backend was mounted on.
        :type mount_point: str | unicode
        :return: The response of the request.
        :rtype: requests.Response
        """
        api_path = '/v1/{mount_point}/roles/{name}'.format(
            mount_point=mount_point,
            name=name,
        )
        return self._adapter.delete(
            url=api_path,
        )