remove demo link for Leon

`Demo` links should only be used for interactive demos, i.e. not video demonstrations.

README.md

@@ -150,7 +150,7 @@ _See also [Internet of Things (IoT)](#internet-of-things-iot)_
 - [Huginn](https://github.com/huginn/huginn) - Allows you to build agents that monitor and act on your behalf. `MIT` `Ruby`
 - [Kibitzr](https://kibitzr.github.io) - Lightweight personal web assistant with powerful integrations. ([Source Code](https://github.com/kibitzr/kibitzr)) `MIT` `Python`
 - [LazyLibrarian](https://gitlab.com/LazyLibrarian/LazyLibrarian) `⚠` - LazyLibrarian is a program to follow authors and grab metadata for all your digital reading needs. It uses a combination of Goodreads Librarything and optionally GoogleBooks as sources for author info and book info. `GPL-3.0` `Python`
-- [Leon](https://getleon.ai) - Open-source personal assistant who can live on your server. ([Demo](https://www.youtube.com/watch?v=p7GRGiicO1c), [Source Code](https://github.com/leon-ai/leon)) `MIT` `Node.js`
+- [Leon](https://getleon.ai) - Open-source personal assistant who can live on your server. ([Source Code](https://github.com/leon-ai/leon)) `MIT` `Node.js`
 - [Lidarr](https://lidarr.audio/) - Lidarr is a music collection manager for Usenet and BitTorrent users. ([Source Code](https://github.com/Lidarr/Lidarr)) `GPL-3.0` `C#`
 - [Medusa](https://github.com/pymedusa/SickRage) - Automatic Video Library Manager for TV Shows. It watches for new episodes of your favorite shows, and when they are posted it does its magic. `GPL-3.0` `Python`
 - [MeTube](https://github.com/alexta69/metube) - Web GUI for youtube-dl, with playlist support. Allows downloading videos from dozens of websites. `AGPL-3.0` `Python/Nodejs/Docker`