eventDestroy

Called before an event’s element is removed from the DOM.

function( info ) { }

info is a plain object that contains the following properties:

event	The associated Event Object.
el	The HTML element that is being destroyed.
isMirror	`true` if the element being rendered is a “mirror” from a user drag, resize, or selection (see selectMirror). `false` otherwise.
view	The current View Object.

This callback gets called once for every event element. It is a great way to tear down any plugins you might have applied in eventRender.