Updated openstack/openstack
Project: openstack/oslo.db  3f6b009570d99cf4587fd027ba0bfc4e37e47b8b

remove definitions of Python Source Code Encoding

I think PEP 0263 (http://legacy.python.org/dev/peps/pep-0263/) is
not used anywhere else and so it should be removed.

Change-Id: Ic2c2b284cc80e3db4380fda6f81d45f6d57f2d02