declared but not used

[nicolasStevenin]

Hi,

command: go test -buildmode pie -compiler gc -ldflags "-X github.com/vmware/photon-controller-go-sdk/version=738 -X github.com/vmware/photon-controller-go-sdk/version.tag=PROMOTED-738 -extldflags '-Wl,-z,relro '"

 github.com/vmware/photon-controller-go-sdk/photon
./subnets_test.go:24:3: portGroups declared but not used
./projects_test.go:28:3: flavorID declared but not used
./disks_test.go:25:3: flavorID declared but not used
vet: typecheck failures
FAIL    github.com/vmware/photon-controller-go-sdk/photon [build failed]