chore: fix minor clippy lints #114

Job	Run time
Test Suite	1m 49s
Rustfmt	12s
Check	1m 33s
Clippy	1m 21s
Cross compile (armv7-unknown-linux-gnueabihf)	27s
Cross compile (powerpc-unknown-linux-gnu)	15s
Check rustdoc intra-doc links	23s
Cross compile (wasm32-unknown-unknown)	15s
Cross compile (powerpc64-unknown-linux-gnu)	18s
	6m 33s

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