net/af_xdp: remove unused local statistic

The rx_dropped statistic is never incremented so its existence
is pointless. Remove it.

Fixes: f1debd7 ("net/af_xdp: introduce AF_XDP PMD")
cc: stable@dpdk.org

Reported-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: 0-day Robot <robot@bytheb.org>

drivers/net/af_xdp/rte_eth_af_xdp.c

@@ -123,7 +123,6 @@ struct xsk_umem_info {
 struct rx_stats {
 	uint64_t rx_pkts;
 	uint64_t rx_bytes;
-	uint64_t rx_dropped;
 	uint64_t imissed_offset;
 };
 
@@ -876,7 +875,6 @@ eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 
 		stats->ipackets += stats->q_ipackets[i];
 		stats->ibytes += stats->q_ibytes[i];
-		stats->imissed += rxq->stats.rx_dropped;
 		stats->oerrors += txq->stats.tx_dropped;
 		fd = process_private->rxq_xsk_fds[i];
 		ret = fd >= 0 ? getsockopt(fd, SOL_XDP, XDP_STATISTICS,