def METHOD_NAME(bucket: str, obj_key: str):
    """Delete file object.
    Args:
        bucket: bucket name
        obj_key: object name to store file
    """
    obj = cos.resource.Bucket(bucket).Object(obj_key)
    obj.delete()
    obj.wait_until_not_exists()
    LOG.info(f"Deleted successfully the file object({obj_key})")