fix(lint): apply clippy suggestions #802

Job	Run time
Test	3m 14s
Lint	1m 4s
Build (x86_64-unknown-linux-gnu)	1m 31s
Build (x86_64-unknown-linux-musl)	1m 43s
Build (i686-unknown-linux-gnu)	1m 33s
Build (i686-unknown-linux-musl)	1m 40s
Build (aarch64-unknown-linux-gnu)	1m 36s
Build (aarch64-unknown-linux-musl)	1m 50s
Build (armv5te-unknown-linux-gnueabi)	1m 48s
Build (armv7-unknown-linux-gnueabihf)	1m 36s
Build (arm-unknown-linux-gnueabi)	1m 35s
Build (arm-unknown-linux-gnueabihf)	1m 43s
Build (riscv64gc-unknown-linux-gnu)	1m 38s
	22m 31s

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