[3.11] Revert "Avoid error lexing multiprocessing docs code block on Pygments 2.15.0" (GH-103616) (#103695)

Revert "Avoid error lexing multiprocessing docs code block on Pygments 2.15.0" (GH-103616)

This reverts commit ace51dcdb781b0608b1273d246ebaee849561435.
(cherry picked from commit 8cb2b0f953288ff8749e686c268097cdd5a393e2)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>