fix comment in code

cli/cmd/role.go

@@ -35,9 +35,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-//var duid string
-
-// networkElementCmd represents the network element command.
+// roleCmd represents the role command.
 var roleCmd = &cobra.Command{
 	Use:   "role",
 	Short: "the role command contains all sub-commands for role management",