Revert "bpo-42160: tempfile: Reduce overhead of pid check. (GH-22997)"

`_RandomNameSequence` is not true singleton so using `os.register_at_fork` doesn't make sense unlike `random._inst`.

This reverts commit 8e409cebad42032bb7d0f2cadd8b1e36081d98af.

Inada Naoki committed 5y ago

43ca084c88d1e46a44199f347c72e26db84903c9

Parent: b62bdf7

Committed by GitHub <noreply@github.com> on 10/31/2020, 2:15:38 AM