Removed IRC link

input/contact.md

 
 Vimeo: [xythobuz][5]
 
-IRC: [irc.xythobuz.de][6] and probably elsewhere :)
-
  [1]: files/xythobuz.gpg
  [2]: https://twitter.com/xythobuz
  [3]: https://www.facebook.com/vballert
  [4]: http://www.youtube.com/user/xythobuz
  [5]: https://vimeo.com/xythobuz
- [6]: https://kiwiirc.com/client/irc.xythobuz.de/xythobuz