removed useless code

NodeApp/src/helpers/AutoCompletionHelper.ts

 import { Command } from 'commander';
 import { writeFileSync } from 'fs';
 
-function isLeaf(cmd: Command): boolean {
-    return cmd.commands.length == 0
-}
-
 function computeDepth(cmd: Command | undefined): number {
     if (cmd === undefined) {
         return 0