hollow-node.go:delete useless para. and import

cmd/kubemark/hollow-node.go

@@ -18,7 +18,6 @@ package main
 
 import (
 	"fmt"
-	"time"
 
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apiserver/pkg/util/flag"
@@ -56,9 +55,8 @@ type HollowNodeConfig struct {
 }
 
 const (
-	maxPods            = 110
-	podsPerCore        = 0
-	configResyncPeriod = 15 * time.Minute
+	maxPods     = 110
+	podsPerCore = 0
 )
 
 var knownMorphs = sets.NewString("kubelet", "proxy")