Revert "Don't warn on deprecated declarations, this is a stable branch."
Revert "Don't warn on deprecated declarations, this is a stable branch."

This reverts commit 4e5a187773cb34de567e3cf90d62710830bbd876.

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control