Unbinds an event listener previously bound to the current layer.
This is a shortcut for up.layer.current.off().
See up.Layer#off() for more documentation.
The event types to unbind.
Multiple event types may be passed as either a space-separated string ('foo bar'), a comma-separated string ('foo, bar')
or as an array of types (['foo', 'bar']).
The listener function to unbind.
You must pass a reference to the same function reference that was used to register the listener.