remove experimental ground-suite project

Signed-off-by: Onur Özkan <work@onurozkan.dev>

docs/src/index.md

@@ -12,8 +12,7 @@ Markdown.
 ## Index
 
 - New contributors should read [Getting started](getting-started.md).
-- Firmware source and its Rust workspace begin in `firmware/`; the desktop
-  application is a sibling project in `ground-suite/`.
+- Firmware source and its Rust workspace begin in `firmware/`.
 - Board work belongs under [Boards](boards/index.md).
 - The currently supported closed-loop simulation is [Host SITL](sitl.md).
 - [Configuration](configuration.md) distinguishes the current SITL profile