qapi/qapi-schema: Address the introduction's bit rot

Cut the crap that stopped making sense years ago.  Adjust the
remainder.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20250404121413.1743790-10-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
1 file changed