E-VPN: remove obsolete code for RRs without proper E-VPN support
E-VPN: remove obsolete code for RRs without proper E-VPN support

openstack/networking-bagpipe-l2,stackforge/networking-bagpipe-l2,murat1985/bagpipe-bgp,openstack/networking-bagpipe,stackforge/networking-bagpipe-l2,murat1985/bagpipe-bgp,openstack/networking-bagpipe,openstack/networking-bagpipe-l2