docs: Remove Matrix

Removing due to lack of interest by anyone in the dev team

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing
 
-Pull requests are welcome. For easier coordination you can visit the developer discussion channel on [Discord](https://discord.gg/5psYsup) or alternatively the [Matrix Server](https://matrix.to/#/#cemu:cemu.info).
+Pull requests are welcome. For easier coordination you can visit the developer discussion channel on [Discord](https://discord.gg/5psYsup).
 Before submitting a pull request, please read and follow our code style guidelines listed in [CODING_STYLE.md](/CODING_STYLE.md).
 
 If coding isn't your thing, testing games and making detailed bug reports or updating the (usually outdated) compatibility wiki is also appreciated!

README.md

@@ -2,7 +2,6 @@
 
 [![Build Process](https://github.com/cemu-project/Cemu/actions/workflows/build.yml/badge.svg)](https://github.com/cemu-project/Cemu/actions/workflows/build.yml)
 [![Discord](https://img.shields.io/discord/286429969104764928?label=Cemu&logo=discord&logoColor=FFFFFF)](https://discord.gg/5psYsup)
-[![Matrix Server](https://img.shields.io/matrix/cemu:cemu.info?server_fqdn=matrix.cemu.info&label=cemu:cemu.info&logo=matrix&logoColor=FFFFFF)](https://matrix.to/#/#cemu:cemu.info)
 
 This is the code repository of Cemu, a Wii U emulator that is able to run most Wii U games and homebrew in a playable state.
 It's written in C/C++ and is being actively developed with new features and fixes.
@@ -15,7 +14,6 @@ Cemu is currently only available for 64-bit Windows, Linux & macOS devices.
  - [Compatibility List/Wiki](https://wiki.cemu.info/wiki/Main_Page)
  - [Official Subreddit](https://reddit.com/r/Cemu)
  - [Official Discord](https://discord.gg/5psYsup)
- - [Official Matrix Server](https://matrix.to/#/#cemu:cemu.info)
  - [Setup Guide](https://cemu.cfw.guide)
 
 #### Other relevant repositories: