net/hns3: remove unused constants

This patch removed some unused macros defined in hns3_rss.h,
these macros are used to set tuples for abandoned RTE_ETH_FILTER_HASH
in hns3_dev_filter_ctrl().

Signed-off-by: Hao Chen <chenhao164@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>