'DELETE /api/bookmarks/v1/bookmarks/{username},{usage_id}'

def delete(self, request, username=None, usage_id=None):

    usage_key_or_response = self.get_usage_key_or_error_response(usage_id=usage_id)
    if isinstance(usage_key_or_response, Response):
        return usage_key_or_response
    try:
        api.delete_bookmark(user=request.user, usage_key=usage_key_or_response)
    except ObjectDoesNotExist:
        error_message = ugettext_noop(u'Bookmark    with    usage_id:    {usage_id}    does    not    exist.').format(usage_id=usage_id)
        log.error(error_message)
        return self.error_response(error_message, error_status=status.HTTP_404_NOT_FOUND)
    return Response(status=status.HTTP_204_NO_CONTENT)
