[3.13] gh-117026: Remove outdated sentence in SimpleHTTPRequestHandler docs (GH-117027) (GH-134108)

The code was changed in 0f7cddc308b297e6a1c2dd61503acea38401656f (bpo-839496/gh-39531).
(cherry picked from commit ea2d707bd59963bd4f53407108026930ff12ae56)

Co-authored-by: Saleh Dehqanpour <salehdeh76@gmail.com>