I left it unmaintained due to the question of Unity 7's development when Canonical announced they were dropping Unity as a DE. It appears that Unity 7 will be community maintained, at least for the next maintenance cycle.

Mike

On Tue, Mar 6, 2018, 12:10 PM Michael Healy <horsemanoffaith@gmail.com> wrote:
I maintain the package and can update it in the next few days.

On Tue, Mar 6, 2018, 12:09 PM Eli Schwartz via aur-requests <aur-requests@archlinux.org> wrote:
On 03/06/2018 02:58 PM, Michael Healy via aur-requests wrote:
> Trusted User Alad has requested deletion of lightdm-unity-greeter and
> unity-settings-daemon. The notes on the deletion request say that the
> packages specifically point to the Unity DE, which is not on the AUR.
> Lightdm-unity-greeter can be used outside of the Unity desktop
> environment. I have used Cinnamon and other DE's, but have used
> lightdm-unity-greeter as my chosen greeter, without Unity being fully
> installed. Unity-settings-daemon is a dependency of
> lightdm-unity-greeter, so I am asking that these packages be left on the
> AUR for community use.

At least the former has been out of date for over a year. It may not be
Unity-specific, but it is unmaintained...

--
Eli Schwartz
Bug Wrangler and Trusted User