Bug#885507: radiotray: Depends on unmaintained python-glade2

[Jeremy Bicha]

Control: severity -1 serious
Control: tags buster sid patch
Control: user pkg-gnome-maintain...@lists.alioth.debian.org
Control: usertag oldlibs pygtk

Please drop the unused dependency on python-glade2.

We are working to remove pygtk from Debian.

Thanks,
Jeremy Bicha