Rust

Fix clippy lints #1592

Job	Run time
wasm-build	48s
clippy	1m 10s
build (stable, ubuntu)	3m 56s
build (stable, ubuntu, -F stream)	3m 54s
build (stable, macos)	2m 58s
build (stable, macos, -F stream)	3m 0s
build (stable, windows)	7m 13s
build (stable, windows, -F stream)	7m 8s
build (beta, ubuntu)	4m 2s
build (beta, ubuntu, -F stream)	4m 6s
build (beta, macos)	3m 8s
build (beta, macos, -F stream)	3m 53s
build (beta, windows)	7m 21s
build (beta, windows, -F stream)	7m 0s
build (nightly, ubuntu)	3m 3s
build (nightly, ubuntu, -F stream)	2m 57s
build (nightly, macos)	2m 54s
build (nightly, macos, -F stream)	2m 55s
build (nightly, windows)	6m 51s
build (nightly, windows, -F stream)	7m 45s
	1h 26m 2s

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