diff --git a/samples/sample28.cpp b/samples/sample28.cpp
deleted file mode 100644
index fc86568..0000000
--- a/samples/sample28.cpp
+++ /dev/null
@@ -1,26 +0,0 @@
-/*NO_TEST*/
-#include "blocks/c_code_generator.h"
-#include "builder/builder.h"
-#include "builder/builder_context.h"
-#include "builder/builder_union.h"
-#include "builder/static_var.h"
-#include "builder/dyn_var.h"
-#include <iostream>
-using builder::builder_union;
-using builder::dyn_var;
-using builder::static_var;
-
-static void foo(void) {
-	dyn_var<int> x;
-	dyn_var<int> y;
-	builder_union<int> z = x + y;
-	builder_union<int> res = 1;
-}
-
-int main(int argc, char *argv[]) {
-	builder::builder_context context;
-	auto ast = context.extract_ast_from_function(foo);
-	ast->dump(std::cout, 0);
-	block::c_code_generator::generate_code(ast, std::cout, 0);
-	return 0;
-}