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

Matthias Braun <matthiasb@fb.com> added the comment: While working on the pull request I felt that the type and constants better fit `descrobject.h` rather than `object.h`. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue2897> _______________________________________