get rid of qrcode-generator in io-bot

bin/io-bot.js

@@ -26,13 +26,7 @@ const bot = new Wechaty({ profile: 'io-bot' })
 bot
 .on('login'	  , user => log.info('Bot', `${user.name()} logined`))
 .on('logout'	, user => log.info('Bot', `${user.name()} logouted`))
-.on('scan', ({url, code}) => {
-  if (!/201|200/.test(code)) {
-    let loginUrl = url.replace(/\/qrcode\//, '/l/')
-    require('qrcode-terminal').generate(loginUrl)
-  }
-  console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
-})
+.on('scan'    , ({url, code}) => console.log(`${url}\n[${code}] Scan QR Code in above url to login: `))
 .on('message', m => {
   m.ready()
     .then(msg => log.info('Bot', 'recv: %s', msg.toStringEx()))