Fixes a couple new clippy lints (#8950) #3

Job	Run time
Check Cargo.lock is up to date	8m 54s
Check deny.toml bans	31s
Check deny.toml bans --features default-release-binaries	31s
Install zebrad from lockfile without cache on ubuntu-latest	8m 45s
Check deny.toml bans --all-features	37s
Check deny.toml sources	32s
Check deny.toml sources --features default-release-binaries	35s
Test stable on ubuntu-latest	40m 39s
Check deny.toml sources --all-features	37s
Test beta on ubuntu-latest	40m 42s
Test stable on macos-latest	48m 50s
Test stable on windows-latest	1h 0m 1s
Check for unused dependencies	1m 1s
Test beta on windows-latest	1h 0m 44s
Open or update issues for OS integration failures	0s
	4h 32m 59s

Provide feedback