Per Brett Okamoto on Twitter Georges-St-Pierre has vacated the middleweight title. I can't say I'm surprised, Wednesday night on UFC Tonight it was said he was dealing with colitis and would not be able to return to competition until it was dealt with.
Furthermore, he delayed his initial return when it was announced last Spring. In May he said he could not compete until November , delaying the division as Michael Bisping had to deal with some medical issues of his own. It seemed it would never happen until it did.
UFC 217 came and went in NYC and he captured the title from Bisping with potential bout against Robert Whittaker in the works but it looks like that won't be happening. He's a great fighter, but it seems staying retired might be his best option. We'll see how the UFC handles this as more details come out.