Delete non-existent nodes

Hi,

I import some different calendars from google. That works fine at the moment. But when I delete an event in the google calendar for example and create a new event, both events are shown in my imported Drupal calendar.

In other Feeds Modules you can find a function:

"Action to take when previously imported nodes are missing in the feed"

Is there a possibility to keep both calendars synchronized? I only change events in google, not in Drupal.

Thnx