Fixes a couple new clippy lints (#8950) #2068

Job	Run time
Check deny.toml bans	30s
Check deny.toml bans --features default-release-binaries	34s
Check deny.toml bans --all-features	31s
Check Cargo.lock is up to date	8m 34s
Check deny.toml sources	29s
Check deny.toml sources --features default-release-binaries	31s
Install zebrad from lockfile without cache on ubuntu-latest	9m 12s
Check deny.toml sources --all-features	37s
Test stable on ubuntu-latest	40m 56s
Check for unused dependencies	15s
Test beta on ubuntu-latest	40m 37s
Test stable on macos-latest	44m 9s
Test stable on windows-latest	58m 32s
Test beta on windows-latest	58m 58s
Open or update issues for OS integration failures	0s
	4h 24m 25s

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