code: def test_response_204(self, session):
      pool_name = "test_pool"
      pool_instance = Pool(
          pool=pool_name, slots=3, include_deferred=False
      )
      session.add(pool_instance)
      session.commit()
  
      response = self.client.delete(
          f"api/v1/pools/{pool_name}",
          environ_overrides={"REMOTE_USER": "test"},
      )
      assert response.status_code == 204
      # Check if the pool is deleted from the db
      response = self.client.get(
          f"api/v1/pools/{pool_name}",
          environ_overrides={"REMOTE_USER": "test"},
      )
      assert response.status_code == 404
  
imports: from __future__ import annotations
  import pytest
  from airflow.api_connexion.exceptions import EXCEPTIONS_LINK_MAP
  from airflow.models.pool import Pool
  from airflow.security import permissions
  from airflow.utils.session import provide_session
  from tests.test_utils.api_connexion_utils import assert_401, create_user, delete_user
  from tests.test_utils.config import conf_vars
  from tests.test_utils.db import clear_db_pools
label_desc: Use image node_id 1 for calling the TestDeletePool obj's underlying member method code with example usage: obj.test_response_204(session) without return types