m: Remove libc from our dependencies #663

Job	Run time
clippy	21s
cross (ubuntu-latest)	1m 34s
cross (macos-latest)	32s
fmt	7s
msrv (ubuntu-latest, 1.63)	59s
msrv (windows-latest, 1.63)	1m 24s
security_audit	1m 29s
test (ubuntu-latest, nightly)	1m 9s
test (ubuntu-latest, beta)	48s
test (ubuntu-latest, stable)	46s
test (windows-latest, nightly)	1m 18s
test (windows-latest, beta)	1m 11s
test (windows-latest, stable)	2m 1s
test (macos-latest, nightly)	46s
test (macos-latest, beta)	48s
test (macos-latest, stable)	2m 18s
test (windows-latest, nightly-x86_64-pc-windows-gnu)	1m 27s
test (windows-latest, nightly-i686-pc-windows-msvc)	1m 30s
test (windows-latest, nightly-i686-pc-windows-gnu)	1m 29s
wine	1m 26s
	23m 23s

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