Delete comments that are no longer valid
Delete comments that are no longer valid

The Py2.6 comments are no longer relevant since we don't support that
version of Python anymore.

Also did a little re-spacing of some function.

Change-Id: I93fc7a0d3d9a4f06b704cad781396dad891016ad

jmvrbanac/barbican,jmvrbanac/barbican,MCDong/barbican,cneill/barbican,cneill/barbican,MCDong/barbican,cloudkeep/barbican,openstack/barbican,cloudkeep/barbican,openstack/barbican