TEST/MINOR: fix go vet errors #1094

Job	Run time
generate-models	1m 24s
generate-specification	54s
HAProxy check commit message	-1s
go mod tidy	0s
license-check	0s
Build	-1s
lint-spec	-1s
golangci-lint	-1s
Tests	-1s
e2e on HAProxy	-1s
	2m 12s

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