net: hns3: remove an unnecessary case 0 in hclge_fd_convert_tuple()

Since case default has included case 0, so removes this
redundant case 0.
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.c

@@ -5006,8 +5006,6 @@ static bool hclge_fd_convert_tuple(u32 tuple_bit, u8 *key_x, u8 *key_y,
 		return true;
 
 	switch (tuple_bit) {
-	case 0:
-		return false;
 	case BIT(INNER_DST_MAC):
 		for (i = 0; i < ETH_ALEN; i++) {
 			calc_x(key_x[ETH_ALEN - 1 - i], rule->tuples.dst_mac[i],