docs: def experiment_group_pre_delete(sender, **kwargs):
      """Delete all group outputs."""
      instance = kwargs['instance']
  
      if instance.is_selection:
          return
  
      # Delete outputs and logs
      celery_app.send_task(
          SchedulerCeleryTasks.STORES_SCHEDULE_OUTPUTS_DELETION,
          kwargs={
              'persistence': instance.persistence_outputs,
              'subpath': instance.subpath,
          },
          countdown=conf.get('GLOBAL_COUNTDOWN'))
      celery_app.send_task(
          SchedulerCeleryTasks.STORES_SCHEDULE_LOGS_DELETION,
          kwargs={
              'persistence': instance.persistence_logs,
              'subpath': instance.subpath,
          },
          countdown=conf.get('GLOBAL_COUNTDOWN'))