events: remove unused scheduling functions

src/knot/events/events.c

@@ -310,11 +310,6 @@ void _zone_events_schedule_at(zone_t *zone, ...)
 	va_end(args);
 }
 
-bool zone_events_is_scheduled(zone_t *zone, zone_event_type_t type)
-{
-	return zone_events_get_time(zone, type) > 0;
-}
-
 void zone_events_enqueue(zone_t *zone, zone_event_type_t type)
 {
 	if (!zone || !valid_event(type)) {
@@ -340,11 +335,6 @@ void zone_events_enqueue(zone_t *zone, zone_event_type_t type)
 	zone_events_schedule_at(zone, type, time(NULL));
 }
 
-void zone_events_cancel(zone_t *zone, zone_event_type_t type)
-{
-	zone_events_schedule_at(zone, type, 0);
-}
-
 void zone_events_freeze(zone_t *zone)
 {
 	if (!zone) {

src/knot/events/events.h

@@ -118,23 +118,6 @@ void _zone_events_schedule_at(struct zone *zone, ...);
 #define zone_events_schedule_now(zone, type) \
 	zone_events_schedule_at(zone, type, time(NULL))
 
-
-///*!
-// * \brief Check if zone event is scheduled.
-// *
-// * \param zone  Zone to check event of.
-// * \param type  Type of event.
-// */
-//bool zone_events_is_scheduled(struct zone *zone, zone_event_type_t type);
-
-///*!
-// * \brief Cancel one zone event.
-// *
-// * \param zone  Zone to cancel event in.
-// * \param type  Type of event to cancel.
-// */
-//void zone_events_cancel(struct zone *zone, zone_event_type_t type);
-
 /*!
  * \brief Freeze all zone events and prevent new events from running.
  *