Uninstall Ruby on Rails on 11.0.9

[xxx]

Hello, together.

I'm using Plesk 11.0.9 on a Ubuntu 10 Linux machine. Everything is fine.
Weeks ago a customer asked me for Ruby on Rails support and I installed it using Plesk autoinstaller.
But now, we don't need this feature anymore.
I'm wondering how I can uninstall Ruby on Rails with/on Plesk.
I already tried plesk autoinstaller but I don't find a way do uninstall this feature.

It would be nice to get known the secret ;-)

Thanks a lot!

P.S.: Please don't discuss why I want to uninstall it. I want it! ;-)