drop more cros_bundle_firmware related files

A lot of stuff was dropped here in commit 8b3456a4ca895f01fec4036a739,
but a few files only used by that code was missed.  Drop them too.

BUG=chromium:595715
TEST=precq passes
CQ-DEPEND=CL:1114480

Change-Id: I3dc21d287dcb3477e766bca51c5cc32413bd53ba
Reviewed-on: https://chromium-review.googlesource.com/1114478
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
6 files changed