Remove PhotoLight (#3384)

App wasn't updated since 2013 and does not run anymore with modern PHP versions. Tested with PHP 7.4 which becomes unsupported in November.

README.md

@@ -1552,7 +1552,6 @@ A [gallery](https://en.wikipedia.org/wiki/Gallery_Software) is software that hel
 - [MediaHut](https://github.com/Fortyseven/MediaHut/) - A truly single-file, no-database, drop-in PHP media gallery. ([Demo](https://media.Network47.org/)) `MIT` `PHP`
 - [Mejiro](https://github.com/dmpop/mejiro) - An easy-to-use PHP web application for instant photo publishing. `GPL-3.0` `PHP`
 - [Photo Stream](https://github.com/waschinski/photo-stream) - Minimalist self-hosted photo stream. ([Demo](https://floremotion.de/)) `MIT` `Ruby`
-- [PhotoLight](https://github.com/thibaud-rohmer/PhotoLight) - The easiest photo gallery there is. `GPL-3.0` `PHP`
 - [Photonix](https://photonix.org/) - A new web-based photo management application with object recognition, location awareness, color analysis and other ML algorithms. ([Demo](https://demo.photonix.org/), [Source Code](https://github.com/photonixapp/photonix)) `AGPL-3.0` `Python`
 - [PhotoPrism](https://photoprism.org) - Personal photo management powered by Go and Google TensorFlow.  Browse, organize, and share your personal photo collection, using the latest technologies to automatically tag and find pictures. ([Source Code](https://github.com/photoprism/photoprism)) `MIT` `Go`
 - [Photoview](https://photoview.github.io/) - A simple and user-friendly Photo Gallery for personal servers. It is made for photographers and aims to provide an easy and fast way to navigate directories, with thousands of high resolution photos. ([Demo](https://photos.qpqp.dk/), [Source Code](https://github.com/photoview/photoview)) `GPL-3.0` `Go`