code: def delete_roles(app):
      for role in app.appbuilder.sm.get_all_roles():
          delete_role(app, role.name)
  
file_path: airflow/tests/test_utils/api_connexion_utils.py
imports: from __future__ import annotations
  from contextlib import contextmanager
  from airflow.api_connexion.exceptions import EXCEPTIONS_LINK_MAP
  from airflow.providers.fab.auth_manager.security_manager.override import EXISTING_ROLES
label_desc: Use image node_id 7 for calling a global function with example usage: delete_roles(app) without return types