Fix clippy #1920

Job	Run time
Test wasm32-wasip1-thread	29s
Test build-std (aarch64-tvos)	2m 1s
Test build-std (aarch64-tvos-sim)	1m 42s
Clippy	6s
Test wasm (wasm32-unknown-unknown)	17s
Test build-std (x86_64-tvos)	1m 43s
Test CUDA support	23s
MSRV (ubuntu-latest)	18s
Rustfmt	6s
semver-checks	10s
MSRV (windows-latest)	40s
Test (stable)	1m 7s
MSRV (macos-latest)	31s
Test (beta)	1m 15s
Test (nightly)	1m 13s
Test (linux32)	2m 5s
Test (macos)	2m 56s
Test (aarch64-macos)	1m 27s
Test (aarch64-ios)	49s
Test (win32)	1m 43s
Test (win64)	3m 22s
Test (mingw32)	2m 40s
Test (mingw64)	2m 43s
Test (windows-2019)	3m 47s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	2m 0s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, clang, clang++)	4m 2s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, clang-cl, clang-cl)	4m 48s
	44m 23s

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