diff --git a/src/aijack/collaborative/tree/a.cpp b/src/aijack/collaborative/tree/a.cpp
deleted file mode 100644
index 961855b0..00000000
--- a/src/aijack/collaborative/tree/a.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "secureboost/secureboost.h"
-#include "xgboost/xgboost.h"
-
-int main() {
-  XGBoostClassifier clf(2);
-  SecureBoostClassifier sclf(2);
-}