Remove DNS challenge TXT.

def remove_dns_challenge_txt(self, zone_id, domain, txt_challenge):
        """
        Remove DNS challenge TXT.
        """
        print("Deleting DNS challenge..")
        resp = self.route53.change_resource_record_sets(
            HostedZoneId=zone_id,
            ChangeBatch=self.get_dns_challenge_change_batch('DELETE', domain, txt_challenge)
        )

        return resp