mainboard/google/kahlee: Remove usb_oc.asl files

These files aren't needed for the overcurrent functionality.

BUG=b:69305596, b:69229635
TEST=Build Grunt & Kahlee.  Overcurrent wasn't yet enabled so no other
testing was needed.

Change-Id: I8dcd50a249e387ccf1142949b359cee09942460a
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/22659
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
4 files changed