diff --git a/source/mijin/internal/exception.hpp b/source/mijin/internal/exception.hpp
index 1979408..fe6c3df 100644
--- a/source/mijin/internal/exception.hpp
+++ b/source/mijin/internal/exception.hpp
@@ -20,12 +20,6 @@
 #define MIJIN_THROWS noexcept
 #define MIJIN_CONDITIONAL_NOEXCEPT(...) noexcept(__VA_ARGS__)
 #endif
-#define MIJIN_EXCEPT_CHOOSE(noexceptType, exceptType) noexceptType
-#define MIJIN_THROW_OR_RETURN(value, exception) return (value)
-#define MIJIN_RETURN_SUCCESS(value) return (value)
 #endif
 
-#define MIJIN_ERROR_BOOL MIJIN_EXCEPT_CHOOSE([[nodiscard]] bool, void)
-#define MIJIN_THROW_OR_RETURN_STD(value, message) MIJIN_THROW_OR_RETURN(value, std::runtime_error(message))
-
 #endif // !defined(MIJIN_INTERNAL_EXCEPTION_HPP_INCLUDED)