Yes, the "ring" has been taken out. From what I understand, the ring was interfering too much with the story of the attraction. Also, imagineers didn't want to confuse guests because the "ring" was actually an old piece of steel pipe that was there from an exit gate. The "ring" also doesn't fit the story of the bride, especially since the re-vamp of the Haunted Mansion. If the attic, you'll notice that the bring is especially fond of luxury, so why would she so carelessly throw her ring out the window? Also, it has been said that the "ring" was taken out because the Haunted Mansion to this day remains a non-linear story attraction, meaning there is no one set story to the mansion, but a series of events. The "ring" made it feel like the predominant story was about the bride and Master Gracey. According to the pictures in the attic, the bride has no connection, marriage or not, to Master Gracey.