remove ioutil in kubelet

Signed-off-by: yxxhero <aiopsclub@163.com>

pkg/kubelet/kubelet_pods.go

@@ -80,7 +80,7 @@ const (
 
 // Get a list of pods that have data directories.
 func (kl *Kubelet) listPodsFromDisk() ([]types.UID, error) {
-	podInfos, err := ioutil.ReadDir(kl.getPodsDir())
+	podInfos, err := os.ReadDir(kl.getPodsDir())
 	if err != nil {
 		return nil, err
 	}