code: def _delete_record(self, identifier=None, rtype=None, name=None, content=None):
          
          records = self._raw_records(identifier, rtype, name, content)
          LOGGER.debug('delete_records: %s', [rec['id'] for rec in records])
          self._update_records(records, {
              'deleterecord': True,
              'type': rtype,
              'hostname': name,
              'destination': content,
          })
          LOGGER.debug('delete_record: %s', True)
          return True
docs: Delete an existing record. If record does not exist, do nothing.