net: hns3: remove unused field 'tc_num_last_time' in struct hclge_dev

'tc_num_last_time' is defined, but never used, so remove it.
Reported-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h

@@ -749,7 +749,6 @@ struct hclge_dev {
 	u16 num_tx_desc;		/* desc num of per tx queue */
 	u16 num_rx_desc;		/* desc num of per rx queue */
 	u8 hw_tc_map;
-	u8 tc_num_last_time;
 	enum hclge_fc_mode fc_mode_last_time;
 	u8 support_sfp_query;