setup_sdcard.sh: cleanup drop https://github.com/RobertCNelson/tools.git (replaced)

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
setup_sdcard.sh: dtbs: no reason to be verbose, the number of dtbs is large

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
setup_sdcard.sh: old disabled code

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>