Remove unwanted include

ianthomas23 · ianthomas23 · commit 26347d11d4ce · 2026-04-17T15:31:54.000+01:00
diff --git a/src/utils/input_output.hpp b/src/utils/input_output.hpp
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <stack>
-
 #include "common.hpp"
 
 // OS-specific libraries.
