code: def remove_dns_challenge_txt(self, zone_id, domain, txt_challenge):
          
          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
docs: Remove DNS challenge TXT.