code: def delete(self):
      if self.key is not None:
          self.logger.debug("Deleting artifact: %s", self.key)
          self.storage_handler.delete_file(self.key, shallow=False)
  
imports: import hashlib
  import os
  import re
  import tarfile
  from typing import Dict
  from studio.artifacts import artifacts_tracker
  from studio.util import util, logs
  from studio.credentials import credentials
  from studio.storage import storage_setup
  from studio.storage.storage_type import StorageType
  from studio.storage.storage_handler import StorageHandler
  from studio.storage.storage_handler_factory import StorageHandlerFactory
  from studio.storage.storage_util import tar_artifact, untar_artifact
label_desc: Use image node_id 9 for calling the Artifact obj's underlying member method code with example usage: obj.delete() without return types