removed rudundant copyright
# No part of btclib including this file, may be copied, modified, propagated,
# or distributed except according to the terms contained in the LICENSE file.
-# Copyright (C) 2019-2020 The btclib developers
-#
-# This file is part of btclib. It is subject to the license terms in the
-# LICENSE file found in the top-level directory of this distribution.
-#
-# No part of btclib including this file, may be copied, modified, propagated,
-# or distributed except according to the terms contained in the LICENSE file.
-
"""SegWit address implementation.
