code: def delete_file(self, key, shallow=True):
      raise NotImplementedError
  
imports: import os
  from urllib.parse import urlparse
  from typing import Dict
  from studio.util import logs
  from studio.credentials.credentials import Credentials
  from studio.storage.storage_setup import get_storage_verbose_level
  from studio.storage.storage_type import StorageType
  from studio.storage.storage_handler import StorageHandler
  from studio.storage import storage_util
label_desc: Use image node_id 7 for calling the HTTPStorageHandler obj's underlying member method code with example usage: obj.delete_file(key, shallow) without return types