test(support): fix up unused lint (#3374) #2251

Job	Run time
Check Style	12s
Verify hyper.h is up to date	32s
Test with Miri	1m 54s
Check MSRV	47s
features	21s
Test C API (FFI)	1m 6s
udeps	38s
Test stable on ubuntu-latest	1m 55s
Test stable on windows-latest	4m 25s
Test stable on macOS-latest	1m 59s
Test beta on ubuntu-latest	1m 44s
Test beta on windows-latest	2m 58s
Test beta on macOS-latest	2m 3s
Test nightly on ubuntu-latest	2m 19s
Test nightly on windows-latest	4m 43s
Test nightly on macOS-latest	3m 41s
Build docs	32s
Check exposed types	18s
CI is green	1s
	32m 8s

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