diff --git a/balloon/lib/io.nas b/balloon/lib/io.nas
deleted file mode 100644
index 8024f87..0000000
--- a/balloon/lib/io.nas
+++ /dev/null
@@ -1,29 +0,0 @@
-# the function print is written by Cpp: std::cout
-# the function input is written by Cpp: std::cin
-# so the code is fake XD but the definitions are of great use
-# the definitions are set to avoid redefinition
-# made by github user: ValKmjolnir
-
-# print function use dynamic parameters
-var print=func(args...)
-{
-    return __call_cpp_ostream_std_cout(args);
-};
-
-# the return type of input is __var_string
-var input=func()
-{
-    return __call_cpp_istream_std_cin();
-};
-
-# read from file and return a vector of strings
-var read=func(filename)
-{
-    return __call_Cpp_ifstream(filename);
-};
-
-# write a vector of strings into a file
-var write=func(filename,vector)
-{
-    return __call_Cpp_ofstream(filename,vector);
-};
\ No newline at end of file