Updated openstack/openstack
Project: openstack/oslo-incubator  6c706c5c2223df4883a249fcb8ff3be0b02673f3

Delete graduated serialization files

Per the new process, we will not be keeping graduated files around
on the master branch of incubator.

Change-Id: I37f5065ee1983bc97638534fd747269532d61bda
Closes-Bug: 1371699