[issue2897] PyMemberDef missing in limited API / Deprecate structmember.h

[Matthias Braun]

Change by Matthias Braun <matthiasb at fb.com>:


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pull_requests: +19715
stage: commit review -> patch review
pull_request: https://github.com/python/cpython/pull/20462

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue2897>
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