code: def unpublish(self):
          
          assert self.state == self.DRAFT
  
          with xact():
              self._publish(published=False)
  
              # Delete all scheduled items
              klass = self.get_version_class()
              for obj in klass.normal.filter(object_id=self.object_id, state=self.SCHEDULED):
                  obj.delete()
docs: Unpublish this item.
  
          This will set and currently published versions to
          the archived state and delete all currently scheduled
          versions.