Fixes for clippy 1.76. #937

Job	Run time
Rustfmt	20s
Clippy	1m 18s
Test Suite (ubuntu-latest, stable)	1m 55s
Test Suite (ubuntu-latest, nightly)	1m 57s
Check (ubuntu-latest, stable)	1m 20s
Test Suite (macOS-latest, stable)	2m 59s
Check (ubuntu-latest, nightly)	1m 52s
Test Suite (macOS-latest, nightly)	2m 59s
Check (windows-2019, stable)	3m 22s
Check (windows-2019, nightly)	2m 43s
Check (macOS-latest, stable)	3m 23s
Check (macOS-latest, nightly)	1m 44s
	25m 52s

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