vboot: remove timers from VbSelectAndLoadKernel and crossystem

These timers have not been used in eons, and an alternative
already exists (coreboot's tstamp_table).

BUG=b:124141368, chromium:1014102
TEST=make clean && make runtests
BRANCH=none

Change-Id: Ic0d3e14028315d6f343388c7c1c9d105b7bd58a2
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1860254
Tested-by: Joel Kitching <kitching@chromium.org>
Commit-Queue: Joel Kitching <kitching@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
4 files changed