Remove Jappix

Remove Jappix as it wasn't updated since Jan 2017 and the readme states that it is no longer maintained.

README.md

@@ -413,7 +413,6 @@ _[IPBX](https://en.wikipedia.org/wiki/IP_PBX) telephony software_
 - [Hubzilla](https://hubzilla.org) - Decentralized identity, privacy, publishing, sharing, cloud storage, and communications/social platform. ([Source Code](https://github.com/redmatrix/hubzilla)) `MIT` `PHP`
 - [HumHub](https://www.humhub.org/) - Flexible kit for private social networks. ([Source Code](https://github.com/humhub/humhub)) `AGPL-3.0` `PHP`
 - [Isso](http://posativ.org/isso/) - Lightweight commenting server written in Python and Javascript. It aims to be a drop-in replacement for Disqus. ([Source Code](https://github.com/posativ/isso)) `MIT` `Python`
-- [Jappix](https://jappix.com/) - Jappix is an open social platform, that let's you easily get or keep in touch with everyone. ([Source Code](https://github.com/jappix/jappix)) `AGPL-3.0` `PHP`
 - [Loomio](https://www.loomio.org/) - Loomio is a collaborative decision-making tool that makes it easy for anyone to participate in decisions which affect them. ([Source Code](https://github.com/loomio/loomio)) `AGPL-3.0` `Ruby`
 - [Mastodon](https://joinmastodon.org/) - Federated microblogging server, an alternative to GNU social. ([Source Code](https://github.com/tootsuite/mastodon)) `AGPL-3.0` `Ruby`
 - [MyBB](http://www.mybb.com/) - Free, extensible forum software package. ([Source Code](https://github.com/mybb/mybb)) `LGPL-3.0` `PHP`