Revert "Force jenkins win slave to reboot when slave exits"

This reverts commit ea94d95db8b76bcba4d11d1520345a9956f2b5be.
Fix didn't help. It actually made the situation worse, giving
5 second time window to start build on node which is going to
reboot.

Change-Id: Ia1a20377183f8487753c063d5abaa53a316b2067
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>