Removes changes-since param from list flavors documentation
Removes changes-since param from list flavors documentation

Author: Maria Abrahms
Date: Thursday July 24, 2014

Partial-bug: 1328910
Change-Id: I677e0ef4a6520dbca62bce3cc3da8267e63d1063

DonSchenck/api-site,openstack/api-site,dreamhost/api-site,dreamhost/api-site,DonSchenck/api-site,DonSchenck/api-site,openstack/api-site,rackerlabs/api-site,dreamhost/api-site,Tesora/tesora-api-site,rackerlabs/api-site,Tesora/tesora-api-site,rackerlabs/api-site,openstack/api-site,Tesora/tesora-api-site,dreamhost/api-site,dreamhost/api-site,DonSchenck/api-site,dreamhost/api-site,openstack/api-site,Tesora/tesora-api-site,DonSchenck/api-site,dreamhost/api-site,Tesora/tesora-api-site,rackerlabs/api-site,Tesora/tesora-api-site,Tesora/tesora-api-site