No longer use `libm` default features #4513

Job	Run time
Coverage	4m 10s
Build	1m 49s
Clippy	2m 0s
Audit	20s
Documentation	32s
Formatting	12s
Fuzz (translate)	3m 40s
Fuzz (execute)	3m 50s
Check mininum supported Rust version	29s
Fuzz (differential)	4m 1s
Miri	9m 38s
Miri (spec)	9m 28s
Test (ubuntu-latest)	1m 54s
Test (Address Sanitizer)	2m 48s
uDeps	6m 6s
Test (windows-latest)	3m 24s
Test (macos-latest)	2m 17s
	56m 38s

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