remove koozic (unmaintained since 2020) (#3706)

- ref. 3558

README.md

@@ -1223,7 +1223,6 @@ _See also: [List of streaming media systems - Wikipedia](https://en.wikipedia.or
 - [gonic](https://github.com/sentriz/gonic) - Lightweight music streaming server. Subsonic compatible. `GPL-3.0` `Go`
 - [Groove Basin](https://github.com/andrewrk/groovebasin) - Music player server with a web-based user interface inspired by Amarok 1.4. `MIT` `Nodejs`
 - [koel](https://koel.dev/) - Personal music streaming server that works. ([Demo](https://demo.koel.dev/), [Source Code](https://github.com/koel/koel)) `MIT` `PHP`
-- [KooZic](https://koozic.net/) - Music server with powerful playlist features and Subsonic compatibility. ([Source Code](https://github.com/DocMarty84/koozic)) `LGPL-3.0/MIT` `Python`
 - [LibreTime](https://libretime.org) - Simple, open source platform that lets you broadcast streaming radio on the web (fork of [Airtime](https://github.com/sourcefabric/Airtime)). ([Source Code](https://github.com/LibreTime/libretime)) `AGPL-3.0` `PHP`
 - [LMS](https://github.com/epoupon/lms) - Access your self-hosted music using a web interface. `GPL-3.0` `C++`
 - [Maloja](https://github.com/krateng/maloja) - Self-hosted music scrobble database, alternative to Last.fm. ([Demo](https://maloja.krateng.ch/)) `GPL-3.0` `Python/Docker`