[aur-general] Dropping some packages

[Hugo Doria]

I am not using GNOME anymore (trying enlightenment and openbox), so i
decided to drop some packages. Below is a list of packages that i have
no more interest in maintaining:

brasero
exaile
gdm-themes
gnome-system-tools (and system-tools-backends)
listen
murrine-configurator

Let me know If you're interested in adopting any of these packages and
keep them in [community].

If noone adopt them I will continue maintaining. I do not intend do
move them to unsupported.

-- Hugo