code: def test_delete_should_respond_204(self, session):
      role = create_role(self.app, "mytestrole")
      response = self.client.delete(
          f"/auth/fab/v1/roles/{role.name}",
          environ_overrides={"REMOTE_USER": "test"},
      )
      assert response.status_code == 204
      role_obj = (
          session.query(Role).filter(Role.name == role.name).all()
      )
      assert len(role_obj) == 0
  
imports: from __future__ import annotations
  import pytest
  from airflow.api_connexion.exceptions import EXCEPTIONS_LINK_MAP
  from airflow.providers.fab.auth_manager.models import Role
  from airflow.providers.fab.auth_manager.security_manager.override import EXISTING_ROLES
  from airflow.security import permissions
  from tests.test_utils.api_connexion_utils import assert_401, create_role, create_user, delete_role, delete_user
label_desc: Use image node_id 1 for calling the TestDeleteRole obj's underlying member method code with example usage: obj.test_delete_should_respond_204(session) without return types