RDMA/core: Remove unused declaration rdma_resolve_ip_route()

The definition of rdma_resolve_ip_route() has been removed. Remove the
unused declaration.

Fixes: 6aaecd38 ("RDMA/core: Simplify roce_resolve_route_from_path()")
Link: https://patch.msgid.link/r/20240818055702.79547-2-zhangzekun11@huawei.comSigned-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/core/core_priv.h

@@ -325,9 +325,6 @@ void ib_qp_usecnt_inc(struct ib_qp *qp);
 void ib_qp_usecnt_dec(struct ib_qp *qp);
 
 struct rdma_dev_addr;
-int rdma_resolve_ip_route(struct sockaddr *src_addr,
-			  const struct sockaddr *dst_addr,
-			  struct rdma_dev_addr *addr);
 
 int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
 				 const union ib_gid *dgid,