[AC-934] Gelocation multiple removeEventListener calls will prevent addEventListener

I believe this to be a bug but maybe it is an intended feature. If you create a geolocation event listener for 'location' and then remove it more than once you cannot add it back with a single addEventListener call. Example: I had a play, pause, and stop button. Play added the event listener while pause and stop removed it. This cause an issue when the sequence was play, pause, stop (add, remove, remove). I solved the problem by removing the superfluous remove associated with stop. However, I would think that your code would not want to remove an event listener that was not registered or that it would gracefully ignore such a call. I don't think it is - again, perhaps that is by design but just in case it is not I am logging this ticket.