Clean unused CI features #2656

Job	Run time
check-cfg	22s
minimal	9s
docs	19s
msrv	48s
quickchecking	17s
rustfmt-clippy	30s
test-book	9s
test (ubuntu-latest, 9.0, 0, 0, 0)	1m 40s
test-expectations (ubuntu-latest)	44s
test (ubuntu-latest, 9.0, 0, 0, 1)	1m 44s
test-expectations (macos-latest)	49s
test (ubuntu-latest, 9.0, 0, 1, 0)	1m 31s
test (ubuntu-latest, 9.0, 0, 1, 1)	1m 33s
test (ubuntu-latest, 9.0, 1, 0, 0)	1m 47s
test (ubuntu-latest, 9.0, 1, 0, 1)	1m 46s
test (ubuntu-latest, 9.0, 1, 1, 0)	1m 48s
test (ubuntu-latest, 9.0, 1, 1, 1)	1m 48s
test (ubuntu-latest, 16.0, 0, 0, 0)	1m 48s
test (ubuntu-latest, 16.0, 0, 0, 1)	1m 49s
test (ubuntu-latest, 16.0, 0, 1, 0)	1m 46s
test (ubuntu-latest, 16.0, 0, 1, 1)	1m 47s
test (ubuntu-latest, 16.0, 1, 0, 0)	1m 48s
test (ubuntu-latest, 16.0, 1, 0, 1)	1m 48s
test (ubuntu-latest, 16.0, 1, 1, 0)	1m 47s
test (ubuntu-latest, 16.0, 1, 1, 1)	1m 48s
test (macos-latest, 16.0, 0, 0)	1m 49s
success	1s
	33m 55s

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