cros_generate_update_payload: Stop computing md5 hashes of the root and kern.

These values aren't used by anything, and they're buried in a bunch of other
output making it unlikely a person will even notice they're there. They take a
non-trivial amount of time to compute, so lets get rid of them.

real    7m42.613s
user    5m4.315s
sys     0m23.483s

BUG=chromium:422665
TEST=Ran paygen_payload.

Change-Id: Ie267a5048893ad3a4ee507067bef8e83e68ac8a9
Reviewed-on: https://chromium-review.googlesource.com/223129
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
1 file changed