[aur-general] Removal Requests

[Luca Bennati]

Each one for non existant upstream
logitech_applet https://aur.archlinux.org/packages.php?ID=2074
archfoster https://aur.archlinux.org/packages.php?ID=1935
mpcstick https://aur.archlinux.org/packages.php?ID=12754