Removing dpkg arch definitions for powerpcspe?

Hi!

Was checking last year the status of several of the dpkg arch
definitions, and whether they are in use and/or useful, and
stumbled over the powerpcspe one.

This was requested in #568123, #575158. It got removed from Debian and
was never moved into Debian ports. Is it still being used anywhere?
If this is being used at all, I have no problem with keeping this, the
definition just seemed somewhat dead/unused to me.

Thanks,
Guillem