old_contents: # relative
  from .upload_service_messages import ObjectDeleteMessage  # noqa: F401
  from .upload_service_messages import UploadDataCompleteMessage  # noqa: F401
  from .upload_service_messages import UploadDataMessage  # noqa: F401
  
new_contents: # relative
  from .upload_service_messages import UploadDataCompleteMessage  # noqa: F401
  from .upload_service_messages import UploadDataMessage  # noqa: F401
  from .upload_service_messages import DeleteIncompleteDataUploadMessage
subject: REMOVE unused import