Remove Newtelco Tab (unmaintained since August 2022, vulnerabilities, website down) (#3787)

- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/3558
- https://portal.newtelco.de/ : HTTPSConnectionPool(host='portal.newtelco.de', port=443): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7ff3dc40e200>: Failed to establish a new connection: [Errno -5] No address associated with hostname'))

README.md

@@ -1540,7 +1540,6 @@ _Related: [Monitoring](#monitoring), [Bookmarks and Link Sharing](#bookmarks-and
 - [Hubleys](https://github.com/knrdl/hubleys-dashboard) - Self-hosted personal dashboards to organize links for multiple users via a central yaml config. `MIT` `Docker`
 - [Jump](https://github.com/daledavies/jump) - Yet another self-hosted startpage for your server designed to be simple, stylish, fast and secure. `MIT` `PHP`
 - [LinkStack](https://linkstack.org/) - Open-source, customizable, self-hosted alternative to services like Linktree and Manylink with an intuitive, easy to use user/admin interface. LinkStack allows you to link all your social media platforms easily accessible on one page. ([Demo](https://linksta.cc/), [Source Code](https://github.com/LinkStackOrg/LinkStack)) `AGPL-3.0` `PHP`
-- [Newtelco Tab](https://github.com/ndom91/newtelco-tab) - Beautiful dashboard and new tab launcher with support for App Shortcuts as well as GDrive, Contacts, and notes. ([Demo](https://portal.newtelco.de/)) `MIT` `Nodejs`
 - [Organizr](https://github.com/causefx/Organizr) - Organizr aims to be your one stop shop for your Servers Frontend. `GPL-3.0` `PHP`
 - [Smashing](https://smashing.github.io/) - Smashing, the spiritual successor to Dashing, is a Sinatra based framework that lets you build excellent dashboards. It looks especially great on TVs. ([Source Code](https://github.com/Smashing/smashing)) `MIT` `Ruby`
 - [Web-Portal](https://github.com/enchant97/web-portal) - A python web app designed to allow a easy way to manage the links to all of your web services. `AGPL-3.0` `Docker/Python`