vhost: fix build with clang 15

This variable is not used.

Fixes: abeb865 ("vhost: remove copy threshold for async path")
Cc: stable@dpdk.org

Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

lib/vhost/virtio_net.c

@@ -1877,7 +1877,6 @@ virtio_dev_rx_async_submit_packed(struct virtio_net *dev, struct vhost_virtqueue
 	struct rte_mbuf **pkts, uint32_t count, int16_t dma_id, uint16_t vchan_id)
 {
 	uint32_t pkt_idx = 0;
-	uint32_t remained = count;
 	uint16_t n_xfer;
 	uint16_t num_buffers;
 	uint16_t num_descs;
@@ -1903,7 +1902,6 @@ virtio_dev_rx_async_submit_packed(struct virtio_net *dev, struct vhost_virtqueue
 		pkts_info[slot_idx].mbuf = pkts[pkt_idx];
 
 		pkt_idx++;
-		remained--;
 		vq_inc_last_avail_packed(vq, num_descs);
 	} while (pkt_idx < count);