net: hns3: remove redundant assignment to rx_index

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

----------------------------
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Reviewed-by: Nli yongxin <liyongxin1@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

@@ -163,9 +163,7 @@ static int hns3_dbg_bd_info(struct hnae3_handle *h, const char *cmd_buf)
 	int cnt;
 
 	cnt = sscanf(&cmd_buf[8], "%u %u", &q_num, &tx_index);
-	if (cnt == 2) {
-		rx_index = tx_index;
-	} else if (cnt != 1) {
+	if (cnt != 1 && cnt != 2) {
 		dev_err(dev, "bd info: bad command string, cnt=%d\n", cnt);
 		return -EINVAL;
 	}