code: def _delete_transmissions(self, content_metadata_item_ids):
          
          # pylint: disable=invalid-name
          ContentMetadataItemTransmission = apps.get_model(
              'integrated_channel',
              'ContentMetadataItemTransmission'
          )
          ContentMetadataItemTransmission.objects.filter(
              enterprise_customer=self.enterprise_configuration.enterprise_customer,
              integrated_channel_code=self.enterprise_configuration.channel_code(),
              content_id__in=content_metadata_item_ids
          ).delete()
docs: Delete ContentMetadataItemTransmision models associated with the given content metadata items.