they didn't discontinue it because of oakmoss. many fragrances are discontinued for various reasons. oakmoss is in thousands of fragrances and will continue to be. the EU is attempting to regulate all kinds of things simply so that they can control the markets of fragrances and most everything else on the planet but it's not going to work. oakmoss isn't a dangerous substance. allergies to fragrances could be caused by any number of variables and these allergies are usually mild anyway. luca turin went over all of this in depth on his blog not long ago.
oakmoss is still used in guerlain's fragrances in spite of intentions to remove it along with birch tar, coumarin, and other relatively harmless ingredients. there are various powerful entities lobbying against removing these things, for the big picture has to do with a lot more than a few perfume ingredients. it has to do with global marketing dominance. perfumes are just a tiny fragment of that. you can read about it all over the internet. thomas friedman just did an excellent program on it a few nights ago. it's mind-blowing how many restrictions the EU is attempting to place on the most basic products all over the world. they want you to believe that they're doing it for "your safety" but the real reason has nothing to do with that.