Delete firmware directory

firmware/README.md

@@ -1,6 +0,0 @@
-# Firmware
-The firmware got moved to the [Release page](https://github.com/jomjol/AI-on-the-edge-device/releases).
-
-# Installation Guide
-
-You find the complete installation guide at https://jomjol.github.io/AI-on-the-edge-device-docs/Installation/