Remove useless codes about minion

pkg/kubectl/kubectl.go

@@ -18,7 +18,6 @@ limitations under the License.
 package kubectl
 
 import (
-	"fmt"
 	"strings"
 
 	"k8s.io/kubernetes/pkg/api"
@@ -80,10 +79,6 @@ type ShortcutExpander struct {
 func (e ShortcutExpander) VersionAndKindForResource(resource string) (defaultVersion, kind string, err error) {
 	resource = expandResourceShortcut(resource)
 	defaultVersion, kind, err = e.RESTMapper.VersionAndKindForResource(resource)
-	// TODO: remove this once v1beta1 and v1beta2 are deprecated
-	if err == nil && kind == "Minion" {
-		err = fmt.Errorf("Alias minion(s) is deprecated. Use node(s) instead")
-	}
 	return defaultVersion, kind, err
 }