util.h: remove comment triggering the UNRELEASED check
util.h: remove comment triggering the UNRELEASED check

Having 'UNRELEASED' in a source file makes the release checker unhappy.

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib