Sorry, my fault for not explaining myself.

I mean that since that storyline 8 years ago, they have undone the Scarlet Witch's 'No More Mutants' without the 'Mists and destroyed all the Terrigan Crystals with the Terrigan Bomb, dissipating all the remaining mists into the Earths atmosphere, so there are no more mists.

Currently anyway. I'm sure it'll be changed in an equal amount of years.