obj:removeEventListener(eventname) should assume obj

To mirror the recent changes to obj:addEventListener(eventname) that assumes obj as the target object, if you do obj:removeEventListener(eventname) it should also assume self/obj as the target object.

This way the API will be symmetric and not have to remember to add the parameter for one but not the other. [import]uid: 122310 topic_id: 25510 reply_id: 325510[/import]

+1 [import]uid: 10211 topic_id: 25510 reply_id: 103102[/import]