For quite a while the systemd unit user-weston-term has been in the images even though nothing has used it since very early AGL releases.  It results in repeated harmless, but annoying errors:

Aug 19 17:20:43 qemux86-64 systemd[759]: user-weston-term.path: Failed to queue unit startup job: Unit user-config.service not found.
Aug 19 17:20:43 qemux86-64 systemd[759]: user-weston-term.path: Failed with result 'resources'.

With the new compositor, there is realistically no way to fall back to weston, and even if one did so, the unit isn't useful, so it should be removed to avoid confusion.