Remove remnants of old crates #643

Job	Run time
Format	7s
Audit dependencies	24s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 6s
Clippy (x86_64-unknown-linux-gnu, false, true)	42s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	56s
Smoke-test fuzzing targets	3m 53s
Clippy (armv7-unknown-linux-gnueabihf, true, false, -target arm-linux-gnueabihf -mcpu=generic+v7a...	32s
Build and test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 16s
Validate man pages	9s
Smoke-test fuzzing targets (--all-features)	1m 35s
Clippy (x86_64-unknown-linux-musl, true, false, -target x86_64-linux-musl)	50s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-musl)	1m 2s
Build and test (stable, macos-latest, x86_64-apple-darwin)	1m 41s
Build and test (stable, ubuntu-latest, --all-features, x86_64-unknown-linux-gnu)	1m 7s
Check unused dependencies	56s
Clippy (x86_64-apple-darwin, true, false, -target x86_64-macos-gnu -g)	25s
Build and test (msrv, ubuntu-latest, --all-features, x86_64-unknown-linux-gnu)	1m 18s
Validate configs	33s
Build and test (stable, ubuntu-latest, --all-features, x86_64-unknown-linux-musl)	1m 6s
Build and test (stable, macos-latest, --all-features, x86_64-apple-darwin)	2m 18s
	21m 56s

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