@@ -84,20 +84,11 @@ func bridgeNfIptables() bool {

 	return !SysInfo.BridgeNFCallIPTablesDisabled

 }

-func bridgeNfIP6tables() bool {

-	return !SysInfo.BridgeNFCallIP6TablesDisabled

-}

-

 func unprivilegedUsernsClone() bool {

 	content, err := ioutil.ReadFile("/proc/sys/kernel/unprivileged_userns_clone")

 	return err != nil || !strings.Contains(string(content), "0")

 }

-func ambientCapabilities() bool {

-	content, err := ioutil.ReadFile("/proc/self/status")

-	return err != nil || strings.Contains(string(content), "CapAmb:")

-}

-

 func overlayFSSupported() bool {

 	cmd := exec.Command(dockerBinary, "run", "--rm", "busybox", "/bin/sh", "-c", "cat /proc/filesystems")

 	out, err := cmd.CombinedOutput()

@@ -107,20 +98,6 @@ func overlayFSSupported() bool {

 	return bytes.Contains(out, []byte("overlay\n"))

 }

-func overlay2Supported() bool {

-	if !overlayFSSupported() {

-		return false

-	}

-

-	daemonV, err := kernel.ParseRelease(testEnv.DaemonInfo.KernelVersion)

-	if err != nil {

-		return false

-	}

-	requiredV := kernel.VersionInfo{Kernel: 4}

-	return kernel.CompareKernelVersion(*daemonV, requiredV) > -1

-

-}

-

 func init() {

 	if testEnv.IsLocalDaemon() {

 		SysInfo = sysinfo.New(true)