Remove some potential dead-code. #2574

Job	Run time
test_docs	43s
check_release	1m 47s
build (ubuntu-latest, 3.8)	3m 10s
build (ubuntu-latest, 3.12)	3m 22s
Test Lint	1m 18s
Test Minimum Versions	2m 11s
Test Prereleases	2m 3s
build (windows-latest, 3.8)	9m 45s
build (windows-latest, 3.12)	8m 0s
test_without_debugpy (ubuntu-latest, 3.9)	2m 6s
build (macos-latest, 3.8)	5m 47s
link_check	3m 22s
build (macos-latest, 3.12)	3m 14s
Make SDist	31s
build (windows-latest, 3.9)	9m 43s
build (ubuntu-latest, pypy-3.9)	3m 11s
build (macos-latest, 3.10)	2m 55s
build (ubuntu-latest, 3.11)	3m 7s
Install from SDist and Test	2m 6s
coverage	11s
tests_check	4s
	1h 8m 36s

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