Revert "[bug 1058622][bug 1061433] Live indexing of users as they contribute."

This reverts commit 4b1457bba06b77413cf8e6e4577311e30c3ca1ad.

This is causing a weird exception in tidings tasks. We need to
dig deeper.
Add AnonymousUser case to display_name test case
Tweak the __unicode__ method to be more resilient

We're seeing raven fall down when calling __unicode__ on Profile which
turns around and calls __unicode__ on User which for some reason doesn't
have a username.

This handles that case and if there's any exception thrown there, it
does a goofy thing and shows the profile id and the exception it kicked
up when doing unicode(self.user).

The purpose of this is to give us some information about what's going
on, but mostly to not create cascading errors which raven possibly
doesn't handle well.