README: don't mention dbus-glib which is not needed anymore

Author: monsta

README

@@ -40,7 +40,6 @@ gobject-introspection
 libgtk-3-dev
 libmate-desktop-dev
 libmate-menu-dev
-libdbus-glib-1-dev
 libwnck-3-dev
 librsvg2-dev
 libmateweather-dev