Fix `clippy::semicolon_if_nothing_returned` lints #119

Job	Run time
Check code formatting	4s
Linux (1.56.0)	2m 58s
Linux (stable)	12s
Linux (beta)	20s
Linux (nightly)	18s
Linux (--features serde, 1.56.0)	3m 7s
Linux (--features serde, stable)	16s
Linux (--features serde, beta)	25s
Linux (--features serde, nightly)	22s
Linux (--no-default-features --features libm, 1.56.0)	2m 57s
Linux (--no-default-features --features libm, stable)	13s
Linux (--no-default-features --features libm, beta)	19s
Linux (--no-default-features --features libm, nightly)	19s
Linux (stable, --features mint)	11s
Linux (stable, --features bytemuck)	15s
Linux (stable, --features arbitrary)	13s
Linux (nightly, --features unstable)	19s
Linux (nightly, --features unstable,serde)	21s
Result	1s
	13m 10s

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