cleanup.

src/c_api/c_api.cc

@@ -622,26 +622,6 @@ XGB_DLL int XGBoosterEvalOneIter(BoosterHandle handle,
   API_END();
 }
 
-XGB_DLL int
-XGBoostCalcFeatureScore(BoosterHandle handle, char const *c_importance_type,
-                        unsigned *out_len, const char **feature_names,
-                        const unsigned **feature_ids, const float **scores) {
-  API_BEGIN();
-  CHECK_HANDLE();
-  std::string importance_type {c_importance_type};
-  auto* learner = static_cast<Learner*>(handle);
-  std::vector<bst_feature_t>& features = learner->GetThreadLocal().ret_vec_uint32;
-  std::vector<float>& gains = learner->GetThreadLocal().ret_vec_float;
-  learner->CalcFeatureScore(importance_type, &features, &gains);
-  if (feature_ids) {
-    *feature_ids = dmlc::BeginPtr(features);
-  }
-  CHECK(scores);
-  *scores = dmlc::BeginPtr(gains);
-  *out_len = gains.size();  // FIXME: Rename to scores from gains
-  API_END();
-}
-
 XGB_DLL int XGBoostTreesToDataFrame(BoosterHandle handle) {
   API_BEGIN();
   CHECK_HANDLE();