Function ges_ timeline_ remove_ layer 
Source pub unsafe extern "C" fn ges_timeline_remove_layer(
    timeline: *mut GESTimeline,
    layer: *mut GESLayer,
) -> gbooleanpub unsafe extern "C" fn ges_timeline_remove_layer(
    timeline: *mut GESTimeline,
    layer: *mut GESLayer,
) -> gboolean