[build] remove deprecated gulp-utils

gulpfile.js

@@ -3,9 +3,12 @@ const os = require('os');
 const gulp = require('gulp');
 const clean = require('gulp-clean');
 const Sdk = require('./tasks/sdk');
+const FlashPlayer = require('./tasks/flashplayer');
 const Config = require('./config.json');
 const prepare = require('./build/prepare');
 
+//FlashPlayer.VERSION = '25.0.0.171';
+
 if (Config.SdkDir) {
     Sdk.dir = Config.SdkDir;
 }