opscode/knife-ec2 — pull request #241 by juliandunn (2014-09-21 00:02:39+00:00)
Title: Remove the 'instance data' method of creating EC2 servers

It's been over two years since this was deprecated, so I'm going to suggest that it's safe to remove this functionality. The old Opscode AMIs are no longer documented so it's unlikely anyone is using them at this point.