chore: make clippy happy #4216

Job	Run time
clippy	1m 27s
docs	1m 17s
check no_std	25s
check	25s
check no_std optimism,kzg-rs	31s
test stable --no-default-features	1m 2s
check serde	27s
fmt	13s
test stable	1m 7s
check std	25s
TyposCheck	5s
test stable --all-features	1m 45s
test beta --no-default-features	1m 2s
test beta	54s
test beta --all-features	1m 41s
test nightly --no-default-features	57s
test nightly	54s
test nightly --all-features	1m 38s
	16m 15s

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