fix version marshalling

docker/docker.go

@@ -243,7 +243,6 @@ func StartContainer(containerName string, containerType string) (structs.Contain
 // so we can easily get the correct repo/release channel/tag/hash
 func GetLatestContainerInfo(containerType string) (map[string]string, error) {
 	var res map[string]string
-	conf := config.Conf()
 	arch := config.Architecture
 	hashLabel := arch + "_sha256"
 	versionInfo := config.VersionInfo