[issue43680] Remove undocumented io.OpenWrapper and _pyio.OpenWrapper

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:


New changeset 3bc694d5f3d4eb2e5d2f0b83e498b19662845d4e by Victor Stinner in branch 'master':
bpo-43680: Deprecate io.OpenWrapper (GH-25357)
https://github.com/python/cpython/commit/3bc694d5f3d4eb2e5d2f0b83e498b19662845d4e


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