remove `gir1.2-clutter-gst-3.0` from settings dialog dependencies

[ghuls]

gir1.2-clutter-gst-3.0 (Gobject introspection data for Clutter GStreamer elements) shouldn't be needed for the settings dialog.

This should be enough to get the settings dialog working:

sudo apt-get install gir1.2-gtkclutter-1.0

$ sudo apt-get install gir1.2-gtkclutter-1.0
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  gir1.2-clutter-1.0 gir1.2-cogl-1.0 gir1.2-coglpango-1.0
The following NEW packages will be installed:
  gir1.2-clutter-1.0 gir1.2-cogl-1.0 gir1.2-coglpango-1.0 gir1.2-gtkclutter-1.0
0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
...