bundle_firmware: Drop the yaml_data

The need for this is gone and so is this code.

BUG=chromium:595715
BRANCH=none
TEST=emerge-kevin chromeos-bootimage; see that it still completes

Change-Id: Id7e130412754b1e37808f84cde64a5f304fcc0b6
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/344802
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed