message: README: remove roadmap since this is ever in flux
diff: @@ -16,12 +16,6 @@ It is written in C++11 and aiming to be:
  - Cross-platform (Linux, Mac, Windows, iOS, Android).
  - Extensible (using compile-time plugins).
  -## Roadmap
  -
  -The next steps will be:
  -
  -- Add language bindings for Android, iOS, and Python
  -
  ## Interfacing
  The SDK currently takes care of the MAVLink messaging. Connections over serial, UDP, and TCP are supported on Linux, macOS, and Windows.
  