Tests

chore: remove old deprecated items #3561

Job	Run time
check no-default-features	21s
check serde	19s
check std	16s
clippy	1m 15s
docs	1m 25s
test no_std	22s
test stable --no-default-features	55s
test stable	1m 4s
test stable --all-features	1m 37s
test beta --no-default-features	2m 28s
test beta	2m 23s
fmt	3s
test beta --all-features	2m 30s
test nightly --no-default-features	2m 12s
test nightly	2m 7s
test nightly --all-features	2m 20s
	21m 37s

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