Now that the banner is an RB.SplitButtonView, we no longer want to

register an event handler through the DraftBannerView's events

object. We just use the event handler given to the RB.SplitButtonView

constructor. Previously, the handler for publishing was being called

twice, leading to a confusing permission error. Removing the event

handler fixed the issue.

Ran unit tests.

Ran JS tests.

Could no longer trigger the permission error after applying this patch.