chore: fix minor clippy lints (#275) #934

Job	Run time
Check	1m 36s
Rustfmt	20s
Test Suite	1m 45s
Check rustdoc intra-doc links	27s
Clippy	1m 30s
Cross compile (powerpc-unknown-linux-gnu)	14s
Cross compile (powerpc64-unknown-linux-gnu)	21s
Cross compile (wasm32-unknown-unknown)	21s
Cross compile (armv7-unknown-linux-gnueabihf)	24s
	6m 58s

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