[simulator] Remove previous _exit(0) hack. Doesn't seem to make any difference.
[simulator] Remove previous _exit(0) hack. Doesn't seem to make any difference.

8l/Graphite,mit-carbon/Graphite,victorisildur/Graphite,8l/Graphite,fhijaz/Graphite,nkawahara/Graphite,mit-carbon/Graphite,mit-carbon/Graphite-Cycle-Level,fhijaz/Graphite,8l/Graphite,nkawahara/Graphite,mit-carbon/Graphite-Cycle-Level,fhijaz/Graphite,nkawahara/Graphite,mit-carbon/Graphite,mit-carbon/Graphite,victorisildur/Graphite,victorisildur/Graphite,mit-carbon/Graphite-Cycle-Level,fhijaz/Graphite,victorisildur/Graphite,8l/Graphite,nkawahara/Graphite,mit-carbon/Graphite-Cycle-Level