Remove vue-portal from the list of dependencies

Author: absidue

credits.md

@@ -33,7 +33,6 @@ FreeTube uses the following modules / projects:
 | [bgutils-js](https://github.com/LuanRT/BgUtils)                                    | MIT        |
 | [electron-context-menu](https://github.com/sindresorhus/electron-context-menu)     | MIT        |
 | [marked](https://github.com/markedjs/marked)                                       | MIT        |
-| [portal-vue](https://github.com/LinusBorg/portal-vue)                              | MIT        |
 | [process](https://github.com/defunctzombie/node-process)                           | MIT        |
 | [shaka-player](https://github.com/shaka-project/shaka-player)                      | Apache-2.0 |
 | [swiper](https://github.com/nolimits4web/swiper)                                   | MIT        |