Fix new warnings #1095

Job	Run time
Construct integration test matrix	7s
Vsock tests	2m 16s
Benchmarks / Construct Benchmarks matrix	3s
Cxx interop / Construct Cxx interop matrix	2s
Unit tests / Construct unit test matrix	2s
Soundness / Broken symlinks check	2s
Soundness / API breakage check	2m 5s
Soundness / Documentation check	2m 7s
Soundness / Format check	48s
Soundness / Python lint check	7s
Soundness / License headers check	8s
Soundness / Shell check	37s
Soundness / Unacceptable language check	4s
Soundness / YAML lint check	4s
Cxx interop / Cxx interop / Linux (5.9)	1m 13s
Cxx interop / Cxx interop / Linux (5.10)	1m 12s
Cxx interop / Cxx interop / Linux (6.0)	1m 20s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 34s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 41s
Unit tests / Unit tests / Linux (5.9)	3m 55s
Unit tests / Unit tests / Linux (5.10)	3m 45s
Unit tests / Unit tests / Linux (6.0)	4m 9s
Unit tests / Unit tests / Linux (nightly-6.0)	4m 31s
Unit tests / Unit tests / Linux (nightly-main)	4m 30s
Benchmarks / Benchmarks / Linux (5.9)	4m 38s
Benchmarks / Benchmarks / Linux (5.10)	4m 34s
Benchmarks / Benchmarks / Linux (6.0)	4m 32s
Benchmarks / Benchmarks / Linux (nightly-6.0)	4m 32s
Benchmarks / Benchmarks / Linux (nightly-main)	4m 32s
Integration tests / Linux (5.9)	4m 29s
Integration tests / Linux (5.10)	4m 30s
Integration tests / Linux (6.0)	4m 29s
Integration tests / Linux (nightly-6.0)	4m 28s
Integration tests / Linux (nightly-main)	4m 28s
	1h 21m 34s

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