Remove baseline linting support #2417

Job	Run time
build-wheel	9s
test-nixos (ubuntu-latest)	1m 0s
test-nixos (macos-latest)	2m 46s
build-sdist-validate-dists	9s
test (ubuntu-latest, 3.8)	41s
test (ubuntu-latest, 3.9)	40s
test (ubuntu-latest, 3.10)	31s
test (ubuntu-latest, 3.11)	29s
test (ubuntu-latest, 3.12)	31s
test (ubuntu-latest, 3.13-dev)	42s
test (windows-latest, 3.8)	2m 58s
test (windows-latest, 3.9)	3m 10s
test (windows-latest, 3.10)	3m 18s
test (windows-latest, 3.11)	3m 18s
test (windows-latest, 3.12)	2m 55s
test (macos-latest, 3.8)	1m 35s
test (macos-latest, 3.9)	56s
test (macos-latest, 3.10)	1m 8s
test (macos-latest, 3.11)	1m 4s
test (macos-latest, 3.12)	43s
test (ubuntu-latest, 3.8, --constraint constraints-oldest.txt)	42s
test (ubuntu-latest, 3.12, pip uninstall -y -r constraints-future.txt ; pip install -r constraint...	40s
	30m 5s

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