kconfig: intel_s1000: Clean up App level prj.conf

USB is desired to be configured by default and hence the Kconfigs
are addressed in _defconfig for intel_s1000_crb. Cleaned it up
from the app level prj.conf which was anyway redundant.

Signed-off-by: Rajavardhan Gundi <rajavardhan.gundi@intel.com>
1 file changed