Background
Aria live region has been added and hooked up to mw.notify. If a string or mw.message gets passed into mw.notify it will be added to the live region and thus read to screen readers. If instead an object gets passed into mw.notify we can pass in an options.ariaText to specify what to add to the live region.
The reading list notifications are unnecessarily passing in an object instead of an mw.message. Remove this so that the notification gets added to the live region.