diff --git a/lib/models/calendar/CalendarDate.php b/lib/models/calendar/CalendarDate.php
index b5dad5105d0015c917f48af9cb18c5592468e257..b3608b698fcbfd918a6f8da9083fa3b1941bce0d 100644
--- a/lib/models/calendar/CalendarDate.php
+++ b/lib/models/calendar/CalendarDate.php
@@ -94,16 +94,6 @@ class CalendarDate extends SimpleORMap implements PrivacyObject
 
     }
 
-    public static function garbageCollect()
-    {
-        DBManager::get()->query(
-            'DELETE `calendar_dates`
-            FROM `calendar_date_assignments`
-            LEFT JOIN `calendar_dates` ON (`calendar_dates`.`id` = `calendar_date_assignments`.`calendar_date_id`)
-            WHERE `range_id` IS NULL'
-        );
-    }
-
     /**
      * @deprecated
      */