runbJobs: rm outdated options in comments

We had a comment at the top of runJobs.php listing potential options to
use. That unsurprisingly ended up being outdated. Instead folks should
either:

* page down to the constructor to have the exhaustive list of options
* RTFM by invoking the script with --help

Change-Id: Ic87574b26145376bb9926894a7c35f9f0622a3e9
Merge "runbJobs: rm outdated options in comments"