Before bug 1276395 was merged the delete_port_postcommit() mechanism
drivers did not have access to the bound_segment information that was
in the process of being deleted.
Code was added to the cisco_nexus md to workaround this issue.
This code can now be removed.
Change-Id: If47ef1958bf4de863995b9cfc042abf5bc849e24
Closes-Bug: 1297321