get rid of the script job, we're only using orb-job anyways

[hannesm]

at least that's what I figured.. not sure, @reynir -- do you use these "builder-client schedule" (rather than "builder-client orb-build")?

[reynir]

I rarely use them, but I think I found it useful on rare occasions. I vaguely remember something about bootstrapping. Maybe it was useful since orb-build doesn't take a platform. I will try to see if I remember any more details and update.

I will not be devastated if they are removed.