The Obsidian Google Calendar API allows you to delete events on your own. The function deleteEvent is publicly exposed so codeblocks from Templater or Dataview can access it.
Usage
The first argument of the deleteEvent function is a GoogleEvent object.
To define the calendar where the event is created add a field parent containing a GoogleCalendar object.
If no parent field is set the functions uses the DefaultCalendar.
The second argument deleteAllOccurrences is a boolean that defaults to false.
If it is true and the event is reoccurring, it will delete all occurrences of the event.
Example
<%*
const {deleteEvent, getEvents} = this.app.plugins.plugins["google-calendar"].api;
const events = await getEvents({});
await deleteEvent(events[0], false);
%>