Revert "gh-127586: properly restore blocked signals in resource_tracker.py (GH-127587)" #127983
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This reverts commit 46006a1.
PR #127587 fails on some tier 1 and 2 buildbots which is blocking tomorrow's 3.14 alpha, here's a revert PR in case we need it.
multiprocessing.Pool
does not properly restore blocked signals #127586