code: def clean():
      clear_db_runs()
      yield
      clear_db_runs()
  
file_path: airflow/tests/www/views/test_views_cluster_activity.py
imports: from __future__ import annotations
  import pendulum
  import pytest
  from airflow.models import DagBag
  from airflow.operators.empty import EmptyOperator
  from airflow.utils.state import DagRunState, TaskInstanceState
  from airflow.utils.types import DagRunType
  from tests.test_utils.db import clear_db_runs
label_desc: Use image node_id 2 for calling a global function with example usage: clean() without return types