Is there really a problem? How to demonstrate it?

According to https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/275#issuecomment-41... and https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/275#issuecomment-41..., there is.

I'm afraid we can't just remove that message. You should, however, be able to suppress the warning by redirecting `stderr` to `/dev/null/` (via `2>/dev/null`). I would not be opposed to adding a flag for this as well (e.g. `-suppress-rtprio-warning`).

Closing this in favor of #275.