Turn off automatic reboots.
Turn off automatic reboots.

Now that cbuildbot keeps track of its processes correctly,
there is no need to reboot builders every run anymore.

We have already tested turning off automatic reboots on
the external paladin queues and this has worked fine for
the past 38 days. This indicates that we probably don't
need automatic reboots anymore.

BUG=chromium-os:26916
TEST=make restart

Review URL: http://codereview.chromium.org/10218003

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@133770 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build