[gnome-calendar] event: remove unimplemented and unused prototype

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 84324b3a6f90f19edbbc70a077b5a8c9895dc06b
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Sep 14 17:08:15 2018 -0300

    event: remove unimplemented and unused prototype

 src/gcal-event.h | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/src/gcal-event.h b/src/gcal-event.h
index 1621bfc6..f5514d0a 100644
--- a/src/gcal-event.h
+++ b/src/gcal-event.h
@@ -129,8 +129,6 @@ void                 gcal_event_set_recurrence                   (GcalEvent
 
 GcalRecurrence*      gcal_event_get_recurrence                   (GcalEvent          *self);
 
-void                 gcal_event_remove_from_cache                (GcalEvent          *self);
-
 G_END_DECLS
 
 #endif /* GCAL_EVENT_H */