Fix the dependency issue (#231)

vendor/github.com/vishvananda/netns/README.md

@@ -1,51 +0,0 @@
-# netns - network namespaces in go #
-
-The netns package provides an ultra-simple interface for handling
-network namespaces in go. Changing namespaces requires elevated
-privileges, so in most cases this code needs to be run as root.
-
-## Local Build and Test ##
-
-You can use go get command:
-
-    go get github.com/vishvananda/netns
-
-Testing (requires root):
-
-    sudo -E go test github.com/vishvananda/netns
-
-## Example ##
-
-```go
-package main
-
-import (
-    "fmt"
-    "net"
-    "runtime"
-    "github.com/vishvananda/netns"
-)
-
-func main() {
-    // Lock the OS Thread so we don't accidentally switch namespaces
-    runtime.LockOSThread()
-    defer runtime.UnlockOSThread()
-
-    // Save the current network namespace
-    origns, _ := netns.Get()
-    defer origns.Close()
-
-    // Create a new network namespace
-    newns, _ := netns.New()
-    netns.Set(newns)
-    defer newns.Close()
-
-    // Do something with the network namespace
-    ifaces, _ := net.Interfaces()
-    fmt.Printf("Interfaces: %v\n", ifaces)
-
-    // Switch back to the original namespace
-    netns.Set(origns)
-}
-
-```

vendor/github.com/vishvananda/netns/netns_test.go

@@ -1,66 +0,0 @@
-package netns
-
-import (
-	"runtime"
-	"sync"
-	"testing"
-)
-
-func TestGetNewSetDelete(t *testing.T) {
-	runtime.LockOSThread()
-	defer runtime.UnlockOSThread()
-
-	origns, err := Get()
-	if err != nil {
-		t.Fatal(err)
-	}
-	newns, err := New()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if origns.Equal(newns) {
-		t.Fatal("New ns failed")
-	}
-	if err := Set(origns); err != nil {
-		t.Fatal(err)
-	}
-	newns.Close()
-	if newns.IsOpen() {
-		t.Fatal("newns still open after close", newns)
-	}
-	ns, err := Get()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !ns.Equal(origns) {
-		t.Fatal("Reset ns failed", origns, newns, ns)
-	}
-}
-
-func TestNone(t *testing.T) {
-	ns := None()
-	if ns.IsOpen() {
-		t.Fatal("None ns is open", ns)
-	}
-}
-
-func TestThreaded(t *testing.T) {
-	ncpu := runtime.GOMAXPROCS(-1)
-	if ncpu < 2 {
-		t.Skip("-cpu=2 or larger required")
-	}
-
-	// Lock this thread simply to ensure other threads get used.
-	runtime.LockOSThread()
-	defer runtime.UnlockOSThread()
-
-	wg := &sync.WaitGroup{}
-	for i := 0; i < ncpu; i++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			TestGetNewSetDelete(t)
-		}()
-	}
-	wg.Wait()
-}