Removed Atomia DNS

The project is abandoned since ca. mid 2015, last working version is for Ubuntu 12.04 which was EOL last year.
It's not possible to set up even the most basic configuration following the documentation.

README.md

@@ -239,7 +239,6 @@
   * [VestaCP](http://vestacp.com/) - Hosting panel for Linux but with Nginx.
   * [Virtualmin](http://www.virtualmin.com/) - Hosting panel for Linux based on webmin.
 * DNS
-  * [Atomia DNS](http://atomiadns.com/) - DNS management system.
   * [nsedit](https://github.com/tuxis-ie/nsedit) - nsedit is a DNS editor for PowerDNS, working with PowerDNS's new API.
   * [PDNS Gui](https://github.com/odoucet/pdns-gui) - WebGUI which aids in administering domains and records for PowerDNS with MySQL.
   * [Pi-hole](https://pi-hole.net/) - A blackhole for Internet Advertisements with a gui for managing and monitoring