GM: remove dashcam only cars from cars.md (#23708)
GM: remove dashcam only cars from cars.md (#23708)

* remove cars in dashcam mode

* Update CARS.md

Co-authored-by: Adeeb Shihadeh <560a1160cdca1405d17f7eea1cfe3906403d06ef@gmail.com>
commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot