Remove unused method setup_logging
Remove unused method setup_logging

Method setup_logging in glance/common/config.py wasn't used anywhere.
Similar function is in oslo, and some modules in Glance are using
function log.setup from oslo, like glance/cmd/manage.py#L123

Closes-Bug: #1248214

Change-Id: Icda26943f02df5e495179868aa8b1f4c4e151803

ozamiatin/glance,darren-wang/gl,scripnichenko/glance,kfwang/Glance-OVA-OVF,ozamiatin/glance,sigmavirus24/glance,redhat-openstack/glance,akash1808/glance,rajalokan/glance,takeshineshiro/glance,paramite/glance,saeki-masaki/glance,kfwang/Glance-OVA-OVF,stevelle/glance,redhat-openstack/glance,akash1808/glance,saeki-masaki/glance,vuntz/glance,wkoathp/glance,dims/glance,jumpstarter-io/glance,rajalokan/glance,openstack/glance,takeshineshiro/glance,cloudbau/glance,openstack/glance,tanglei528/glance,klmitch/glance,vuntz/glance,tanglei528/glance,paramite/glance,wkoathp/glance,openstack/glance,klmitch/glance,JioCloud/glance,sigmavirus24/glance,dims/glance,darren-wang/gl,jumpstarter-io/glance,scripnichenko/glance,cloudbau/glance,JioCloud/glance,stevelle/glance