Remove up1 (#2937)

No updates since 2020-07-29, and the demo server is no longer serving.

README.md

@@ -916,7 +916,6 @@ _Related: [Groupware](#groupware)_
 - [Sharry](https://github.com/eikek/sharry) - Share files easily over the internet between authenticated and anonymous users (both ways) with resumable up- and downloads. `GPL-3.0` `Scala/Java`
 - [transfer.sh](https://transfer.sh) - Easy file sharing from the command line. ([Source Code](https://github.com/dutchcoders/transfer.sh)) `MIT` `Go`
 - [Uguu](https://uguu.se/) - Stores files and deletes after X amount of time. ([Source Code](https://github.com/nokonoko/uguu)) `MIT` `PHP`
-- [Up1](https://github.com/Upload/Up1) - Client-side Encrypted Image Host. `MIT` `Nodejs`
 - [Void](https://github.com/AlphaNecron/Void) - Lightweight, fast and elegant file hosting service for ShareX with Web UI and REST API. ([Source Code](https://github.com/AlphaNecron/Void/)) `MIT` `Nodejs`
 - [Web-File-Uploader](https://v2.femto.pw/) - A simple tool to let people upload and share images and files. ([Source Code](https://github.com/femto-apps/web-file-uploader)) `MIT` `Nodejs`
 - [XBackBone](https://github.com/SergiX44/XBackBone) - A simple, fast and lightweight file manager with instant sharing tools integration, like ShareX (a free and open-source screenshot utility for Windows). `AGPL-3.0` `PHP`