Seems like he's off, his twitter has one of these ambiguous 'I'm leaving' type statements.
If he has asked to go, then fine, but as has been said, as a back-up he's been great. I have not once been nervous when he has deputised for DDG. I wouldn't feel the same if Sam Johnstone was in goal, no matter how good he is (and, to be fair, I have no idea).
DDG is 23, there is no way Amos (who's 24) or Johnstone (who's 21) are going to be regulars at this club. It would make more sense to keep the experienced 30 year old Lindegaard as long as he's happy to fulfill that role.