Metal claws don't grow back

Logan's White Privilege knows no bounds.

Maybe that part was erased when they reset the timelines in Days of Future Past? Or Logan just stands on its own in the grand scheme of things, since there are other inconsistencies.

Well he also got them back post The Wolverine and before DOFP and that was never explained but Singer said that it was Magneto who helped him to reform them. And then of course with the timeline reset they were probably never cut off after he got the adamantium treatment