removed sha256 code

threading.Thread(target=cleanup_files, daemon=True).start()

def calculate_sha256(file_path):

    sha256_hash = hashlib.sha256()

    try:

        with open(file_path, "rb") as f:

            for byte_block in iter(lambda: f.read(4096), b""):

                sha256_hash.update(byte_block)

        return sha256_hash.hexdigest()

    except FileNotFoundError:

        return "Calculating..."

def download_iso(file_url, filename):

    file_path = os.path.join(DOWNLOAD_FOLDER, filename)

    temp_file_path = file_path + ".part"