I have no real clue what you are talking about. The message you've copied is a roundup message from the setuptools tracker, not a warning message of some kind.
Yes, that's a warning from the setuptools tracker. I call that a "warning" because it warns you that someone added an issue in the tracker.
Ah, ok. That meaning of "warning" was unknown to me, sorry. So you want the roundup tracker to send its notifications elsewhere. Where exactly?
What specific warning messages are you referring to, who is sending them, and why do you think it is within my power to make them stop?
Because you are the one who set it up some time ago as far as this message says:
It's actually Jeff Rush who is in charge of this tracker instance. I can't change the setup without him agreeing. So, Jeff, where else should the roundup instance for setuptools send its notifications? Regards, Martin