I would be shocked if Disney just scrapped them given they have to have spent a fortune on the lights over the last few years. I don't think any of the original lights are left. The more static ones have all been changed over to LED lights. The ones that "dance" (change colors to pretty much any color to the music) are RGB lights which are very, very expensive (even in bulk). There are thousands of RGB lights just in the canopy thing that is over the side street. If they were planning to get rid of them, I don't think they would have invested that much in new lights. They may have to move them or change the display as the park evolves (that already happened once when they build Lights, Motors, Action and lost residential street) but I'm pretty sure they would find somewhere else to display them.