Remove unnecessary code added for ec2 deprecation
Remove unnecessary code added for ec2 deprecation

The code which depicts ec2 deprecation is removed
in Newton.

Change-Id: Ia9dd7790199b9db3ea901d6e8b4ba1e44c9129dc
Closes-Bug: #1603736

sebrandon1/nova,jianghuaw/nova,Juniper/nova,gooddata/openstack-nova,gooddata/openstack-nova,klmitch/nova,Juniper/nova,rajalokan/nova,mikalstill/nova,vmturbo/nova,phenoxim/nova,mikalstill/nova,rajalokan/nova,gooddata/openstack-nova,openstack/nova,sebrandon1/nova,openstack/nova,jianghuaw/nova,jianghuaw/nova,klmitch/nova,cloudbase/nova,vmturbo/nova,openstack/nova,Juniper/nova,rahulunair/nova,klmitch/nova,rahulunair/nova,cloudbase/nova,phenoxim/nova,mahak/nova,rajalokan/nova,cloudbase/nova,alaski/nova,rahulunair/nova,hanlind/nova,klmitch/nova,hanlind/nova,mikalstill/nova,sebrandon1/nova,gooddata/openstack-nova,vmturbo/nova,jianghuaw/nova,mahak/nova,hanlind/nova,rajalokan/nova,alaski/nova,mahak/nova,vmturbo/nova,Juniper/nova