Don't set clutters 'window-scaling-factor' property

It doesn't exist anymore.

https://bugzilla.gnome.org/show_bug.cgi?id=777732

src/run-js-test.c

@@ -68,7 +68,6 @@ main(int argc, char **argv)
   if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
     return 1;
 
-  g_object_set (clutter_settings_get_default (), "window-scaling-factor", 1, NULL);
   gdk_x11_display_set_window_scale (gdk_display_get_default (), 1);
 
   context = g_option_context_new (NULL);

src/shell-global.c

@@ -858,7 +858,6 @@ update_scale_factor (GtkSettings *settings,
     }
 
   /* Make sure clutter and gdk scaling stays disabled */
-  g_object_set (clutter_settings_get_default (), "window-scaling-factor", 1, NULL);
   gdk_x11_display_set_window_scale (gdk_display_get_default (), 1);
 }