packages: Remove stale libsdp-all.ucl

This package no longer exists since it was merged into bluetooth.

Fixes: 41ee4321cc52 ("libsdp: Move to bluetooth-lib package")
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D55822
Sponsored by: https://www.patreon.com/bsdivy