How do I remove the choice of search engine privacy when users register ?

Hi,

I have a WPMU and Buddypress network. It's probably a dumb question, but I cannot find a way to prevent my users to choose their "search engine privacy" settings at the registration page.

I want to remove that choice from them at that point, to make the process more seamless. Also, since I'm using your excellent "Multisite Privacy" plugin, I'm forcing a specific setting, so there is no use to ask them at the registration.

So is there a simple way to remove the two lines on the "register" page that allow new users to chose between search engine visibility or privacy ?

Thanks a lot in advance and best regards,
DJ