remove repeated import'k8s.io/client-go/kubernetes' in controllermanager.go

cmd/kube-controller-manager/app/controllermanager.go

@@ -41,7 +41,6 @@ import (
 
 	"k8s.io/api/core/v1"
 	"k8s.io/client-go/discovery"
-	"k8s.io/client-go/kubernetes"
 	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
 	restclient "k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/clientcmd"
@@ -242,7 +241,7 @@ func createClients(s *options.CMServer) (*clientset.Clientset, *clientset.Client
 	if err != nil {
 		glog.Fatalf("Invalid API configuration: %v", err)
 	}
-	leaderElectionClient := kubernetes.NewForConfigOrDie(restclient.AddUserAgent(kubeconfig, "leader-election"))
+	leaderElectionClient := clientset.NewForConfigOrDie(restclient.AddUserAgent(kubeconfig, "leader-election"))
 	return kubeClient, leaderElectionClient, kubeconfig, nil
 }