From c961d093b1501f9ce476f1e51d7774af28120407 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Tue, 14 Jan 2025 19:11:33 +0900
Subject: [PATCH] [Bug #21024] <cstdbool> header has been useless

And finally deprecated at C++-17.
Patched by jprokop (Jarek Prokop).
---
 include/ruby/internal/stdbool.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/include/ruby/internal/stdbool.h b/include/ruby/internal/stdbool.h
index e9dee46b38..7f3e6dcf97 100644
--- a/include/ruby/internal/stdbool.h
+++ b/include/ruby/internal/stdbool.h
@@ -27,10 +27,6 @@
 
 #elif defined(__cplusplus)
 # /* bool is a keyword in C++. */
-# if defined(HAVE_STDBOOL_H) && (__cplusplus >= 201103L) && (__cplusplus < 201703L)
-#  include <cstdbool>
-# endif
-#
 # ifndef __bool_true_false_are_defined
 #  define __bool_true_false_are_defined
 # endif