delete event
delete event

Summary: update controller method to delete event

Test Plan: delete event

Reviewers: piccoloman

Reviewed By: piccoloman

Subscribers: gracesnoh, nikita, helenc

Projects: #ashby

Differential Revision: http://phab.calblueprint.org/D495

calblueprint/ashby-village,calblueprint/ashby-village,calblueprint/ashby-village