Fix new warnings #1096

Job	Run time
Construct integration test matrix	5s
Vsock tests	2m 3s
Unit tests / Construct unit test matrix	2s
Benchmarks / Construct Benchmarks matrix	4s
Cxx interop / Construct Cxx interop matrix	3s
Soundness / API breakage check	2m 2s
Soundness / Broken symlinks check	5s
Soundness / Documentation check	2m 9s
Soundness / Format check	44s
Soundness / License headers check	8s
Soundness / Python lint check	5s
Soundness / Shell check	42s
Soundness / Unacceptable language check	2s
Soundness / YAML lint check	3s
Cxx interop / Cxx interop / Linux (5.9)	1m 12s
Cxx interop / Cxx interop / Linux (5.10)	1m 10s
Cxx interop / Cxx interop / Linux (6.0)	1m 16s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 38s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 39s
Unit tests / Unit tests / Linux (5.9)	3m 48s
Unit tests / Unit tests / Linux (5.10)	3m 48s
Unit tests / Unit tests / Linux (6.0)	4m 10s
Unit tests / Unit tests / Linux (nightly-6.0)	4m 30s
Unit tests / Unit tests / Linux (nightly-main)	4m 26s
Integration tests / Linux (5.9)	9m 34s
Integration tests / Linux (5.10)	9m 34s
Integration tests / Linux (6.0)	9m 34s
Integration tests / Linux (nightly-6.0)	9m 35s
Integration tests / Linux (nightly-main)	9m 34s
Benchmarks / Benchmarks / Linux (5.9)	5m 23s
Benchmarks / Benchmarks / Linux (5.10)	5m 12s
Benchmarks / Benchmarks / Linux (6.0)	5m 31s
Benchmarks / Benchmarks / Linux (nightly-6.0)	6m 39s
Benchmarks / Benchmarks / Linux (nightly-main)	4m 29s
	1h 50m 59s

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