Remove gtk-can-change-accels
This options is ignore on GTK > 3.10, so it is useless to support it.
https://developer.gnome.org/gtk3/stable/GtkSettings.html#GtkSettings--gtk-can-change-accels
This options is ignore on GTK > 3.10, so it is useless to support it.
https://developer.gnome.org/gtk3/stable/GtkSettings.html#GtkSettings--gtk-can-change-accels