Re-export io::stdio::cleanup instead of wrap it

Author: bjorn3

library/std/src/io/mod.rs

@@ -299,9 +299,7 @@ mod util;
 
 const DEFAULT_BUF_SIZE: usize = crate::sys_common::io::DEFAULT_BUF_SIZE;
 
-pub(crate) fn cleanup() {
-    stdio::cleanup()
-}
+pub(crate) use stdio::cleanup;
 
 struct Guard<'a> {
     buf: &'a mut Vec<u8>,