RDMA/hns: Remove unused function declarations

commit b16f8188 ("RDMA/hns: Refactor eq code for hip06") left behind
hns_roce_cleanup_eq_table().

commit 773f841a ("RDMA/hns: Avoid filling sgid index when modifying QP
to RTR") leave hns_get_gid_index() unused.

Remove both.

Link: https://lore.kernel.org/r/20230731135916.32392-1-yuehaibing@huawei.com


Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>