remove Cartulary (unmaintained) (#3519)

- unmaintained since 2020
- the homepage of the project it claims to be a part of http://freedomcontroller.com/ is down
- no activity in issue tracker

README.md

@@ -523,7 +523,6 @@ Simple deployment of [E-mail](https://en.wikipedia.org/wiki/Email) servers, e.g.
 - [Buddycloud](http://buddycloud.com/) - Tools, libraries, services and a community to build user-to-user, group and social messaging into your app. Saves time. Scales up. Supports you. ([Source Code](https://github.com/buddycloud)) `Apache-2.0` `Java`
 - [BuddyPress](https://buddypress.org/about/) - Powerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profiles, activity streams, user groups, and more. ([Source Code](https://github.com/buddypress/BuddyPress)) `GPL-2.0` `PHP`
 - [Cactus Comments](https://cactus.chat/) - Cactus Comments is a federated comment system for the open web built on Matrix. ([Demo](https://cactus.chat/demo/), [Source Code](https://gitlab.com/cactus-comments/)) `GPL-3.0` `Python`
-- [cartulary](https://github.com/daveajones/cartulary) - RSS reader, readability tool, article archiver, microblogger, social graph manager and reading list manager. `CDDL-1.0` `PHP`
 - [Chirpy](https://chirpy.dev) - Chirpy is an open-source, privacy-friendly and customizable Disqus (comment system) alternate. ([Demo](https://chirpy.dev/play), [Source Code](https://github.com/devrsi0n/chirpy)) `AGPL-3.0` `Docker/Nodejs`
 - [Commento](https://gitlab.com/commento/commento) - Commento is a discussion platform that you can embed on your blog, news articles, and any place where you want your readers to add comments. `MIT` `Go`
 - [Coral](https://coralproject.net/) - A better commenting experience from Vox Media. ([Source Code](https://github.com/coralproject/talk)) `Apache-2.0` `Nodejs`