Remove xml-backend3.c, now moved to xml-backend.c
Remove xml-backend3.c, now moved to xml-backend.c

jessevdk/gconf,GNOME/gconf,GNOME/gconf,Distrotech/GConf,jessevdk/gconf,hyperair/gconf-gdbus,hyperair/gconf-gdbus,hyperair/gconf-gdbus,GNOME/gconf,Distrotech/GConf,jessevdk/gconf,Distrotech/GConf,GNOME/gconf,Distrotech/GConf,hyperair/gconf-gdbus