net/vhost: remove an unused member
net/vhost: remove an unused member

This patch removes an unused member from pmd_internal.

Signed-off-by: Itsuro Oda <6f00a48a12cd2258d04d617b7498caff34834119@valinux.co.jp>
Reviewed-by: Maxime Coquelin <9a2667dee3b90866bbc9c2696cff2b7d5616c95a@redhat.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk