Prevent double import (#81)

Cannot use BotMan\BotMan\Messages\Attachments\Contact as Contact because the name is already in use

Author: holtkamp

src/TelegramDriver.php

@@ -17,7 +17,6 @@
 use BotMan\BotMan\Drivers\Events\GenericEvent;
 use Symfony\Component\HttpFoundation\Response;
 use BotMan\BotMan\Messages\Attachments\Location;
-use BotMan\BotMan\Messages\Attachments\Contact;
 use Symfony\Component\HttpFoundation\ParameterBag;
 use BotMan\BotMan\Messages\Incoming\IncomingMessage;
 use BotMan\BotMan\Messages\Outgoing\OutgoingMessage;