iOS 8 Xcode 6: What's the point of the grayed out constraints?

Question

In the Xcode 6 betas, when I delete a constraint, it doesn\'t remove it completely, but grays it out. I thought that was to imply that the constraint was used in a different

Answer 1

Double click the grayed out constraint (switches focus to the constraint) then press delete. This will delete the constraint.