Function AERemoveEventHandler 

pub unsafe extern "C-unwind" fn AERemoveEventHandler(
    the_ae_event_class: AEEventClass,
    the_ae_event_id: AEEventID,
    handler: AEEventHandlerUPP,
    is_sys_handler: bool,
) -> i16

Available on crate features AEDataModel and AppleEvents only.

Safety

handler must be implemented correctly.