'Returns info about which routers should be removed
In case dvr serviceable port was deleted we need to check
if any dvr routers should be removed from l3 agent on port\'s host'

def get_dvr_routers_to_remove(self, context, port_id):

    remove_router_info = super(L3_DVR_HA_scheduler_db_mixin, self).get_dvr_routers_to_remove(context, port_id)
    processed_remove_router_info = []
    for router_info in remove_router_info:
        router_id = router_info['router_id']
        agent_id = router_info['agent_id']
        if (not self._check_router_agent_ha_binding(context, router_id, agent_id)):
            processed_remove_router_info.append(router_info)
    return processed_remove_router_info
