fix lambdarank_obj

src/objective/rank_obj.cc

@@ -1,17 +0,0 @@
-/*!
- * Copyright 2019 XGBoost contributors
- */
-
-// Dummy file to keep the CUDA conditional compile trick.
-#include <dmlc/registry.h>
-namespace xgboost {
-namespace obj {
-
-DMLC_REGISTRY_FILE_TAG(rank_obj);
-
-}  // namespace obj
-}  // namespace xgboost
-
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
-#include "rank_obj.cu"
-#endif  // XGBOOST_USE_CUDA && XGBOOST_USE_HIP

src/objective/rank_obj.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "rank_obj.cu"
-#endif