bpo-35293: Remove RemovedInSphinx40Warning (GH-22198)

* bpo-35293: Remove RemovedInSphinx40Warning

* Update Misc/NEWS.d/next/Documentation/2020-09-12-17-37-13.bpo-35293._cOwPD.rst

Co-authored-by: Victor Stinner <vstinner@python.org>

* bpo-35293: Apply Victor's review

Co-authored-by: Victor Stinner <vstinner@python.org>
2 files changed