Unfortunately, it looks like it isn’t possible (for now) to remove the profile box once it has been added (i.e. set for the first time.) Setting the profile FBML to ” “, or an HTML comment, results in a “No content to display.” message.
This is mentioned as a feature request on the Profile.setFBML wiki page.
P.S. I am starting to dislike WordPress’s rich text editor. I’ve had to wrestle with font sizes, manually insert paragraph tags and go through an indirect clipboard feature just to paste without formatting. I don’t want to mess with formatting; I just want all my text to be the same size!
