Fix clippy lints #243

Job	Run time
static builds (ubuntu-latest, stable)	1m 13s
static builds (windows-latest, stable-msvc)	6m 12s
static builds (windows-latest, stable-gnu)	5m 7s
static builds (macos-11, stable)	4m 36s
static builds (macos-latest, stable)	2m 22s
rustfmt	1m 37s
test apt (stable)	31s
conda (ubuntu, conda-forge, stable)	1m 14s
test apt (beta)	37s
Address sanitizer	1m 30s
conda (windows, conda-forge, stable)	2m 59s
test apt (nightly)	45s
conda (macos, conda-forge, stable)	2m 14s
	30m 57s

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