AppVeyor IRC notifications: remove unnecessary delay

I added that delay just to be sure. Now when the notifications are working,
I try removing it.

utils/appveyor/irc-notify.py

@@ -160,7 +160,6 @@ if __name__ == '__main__':
                 for msg in messages:
                     print('PRIVMSG #{} :{}'.format(channel, msg))
                     irc_sock.send('PRIVMSG #{} :{}\r\n'.format(channel, msg).encode())
-                time.sleep(5)
                 # leave the channel
                 irc_sock.send('PART #{}\r\n'.format(channel).encode())
                 sys.exit()