[issue41103] Removing old buffer support

[Inada Naoki]

Change by Inada Naoki <songofacandy at gmail.com>:


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keywords: +patch
pull_requests: +20280
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/21117

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41103>
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