Boy, I hope not.
I think most brick and mortar stores only carry what's most "in demand." M7 is one of my top 3 frags, but I have to go to a specialty perfume store to get it. The guy at that store told me that YSL doesn't sell the stuff in major dept. stores because no one buys it. Same with Jazz and Live Jazz, I think.....
Sephora here in SF only has Kouros and Body Kouros, I believe...and I've never seen a bottle of M7 Fresh (I'd have bought it, if I had....)
But I know of no plans to "pull" the entire YSL line. If anyone else does, though, please let us know so I can stock up.