RM Unmark

LC 2020
> Running Unmark is only recommended for intermediate users.
Suggests not running it

README.md

@@ -267,7 +267,6 @@ Software which allows users to add, annotate, edit, and share [bookmarks](https:
 - [Shaarli](https://github.com/shaarli/Shaarli) - Personal, minimalist, super-fast, no-database bookmarking and link sharing platform. ([Demo](https://demo.shaarli.org)) `Zlib` `PHP`
 - [Shiori](https://github.com/go-shiori/shiori) - Simple bookmark manager built with Go. `MIT` `Go`
 - [ubookmark](https://ungleich.ch/u/projects/ubookmark/) - LDAP enabled bookmarking service. ([Demo](https://ipv6.blog), [Source Code](https://code.ungleich.ch/ungleich-public/ubookmark/)) `GPL-2.0` `Python`
-- [unmark](https://unmark.it/) - Open source to do app for links. ([Source Code](https://github.com/cdevroe/unmark)) `MIT` `PHP`
 - [xBrowserSync](https://www.xbrowsersync.org) - Open source tool for syncing browser data between browsers and devices. ([Source Code](https://github.com/xBrowserSync)) `MIT` `Nodejs`