Remove workaround sleep delay for poweroff
Remove workaround sleep delay for poweroff

Once openbmc/openbmc#1045 is merged, we would no longer need to
wait post power off.

Resolves openbmc/openbmc-test-automation#475

Change-Id: I80f44b31d0c9cd10e6ccff83c98055635ebcfa0d
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation