IPA: don't disallow users to read other users' profile
Reason for removing this: we don't store so much private information
anymore, and we can't disallow people from seeing other people's email
address on a case-by-case basis, it's either everyone or hand-picked
services, but users can't choose to let other users see their info or
not (as with the "private" FAS boolean).
Signed-off-by: Aurélien Bompard <aurelien@bompard.org>