Remove pyflakes from Moniker

Change-Id: I3641151df8a11c06e665dc9e5c572aeaac7a9823
Reviewed-on: https://review.openstack.org/30342
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins