BVS-6548: remove dangling unused method
BVS-6548: remove dangling unused method

 - strangely the cherry-pick did not pick this up

Change-Id: I7a4a17a9e8b4134a2111da15e3d63fa337264dda

openstack/networking-bigswitch,wolverineav/networking-bigswitch,openstack/networking-bigswitch,stackforge/networking-bigswitch,stackforge/networking-bigswitch,wolverineav/networking-bigswitch