[aur-general] Delete request

[Limao Luo]

https://aur.archlinux.org/packages/dropbox-daemon/
The systemctl file is already part of the dropbox package itself, so 
this package is redundant.

https://aur.archlinux.org/packages/brackets-git/
https://aur.archlinux.org/packages/brackets-shell-git/
These were packages I uploaded by mistake, but I never got around to 
posting a delete request here. They were and are currently empty PKGBUILDs.