[autotest] Remove reboot before full update for faster provision

Reboot was added before full update to make sure dut in good state before
full update. However, it costs around 30s. For better provision performance,
reboot is removed in this CL. Any failed test due to provision failure will
be retired if test retry is enabled, which is True for critical suite like
bvt-cq and bvt-inline.

BUG=chromium:426141
TEST=local provision job.

Change-Id: I5accf998b0496f96a5e7251767b1c14b4d131a57
Reviewed-on: https://chromium-review.googlesource.com/236161
Trybot-Ready: Dan Shi <dshi@chromium.org>
Tested-by: Dan Shi <dshi@chromium.org>
Reviewed-by: Fang Deng <fdeng@chromium.org>
Commit-Queue: Dan Shi <dshi@chromium.org>
1 file changed