[llvm] [Support] Remove an outdated MinGW workaround (PR #145294)

[Martin Storsjö via llvm-commits]

https://github.com/mstorsjo created https://github.com/llvm/llvm-project/pull/145294

mingw-w64 has had the _HEAPOK define since the initial commits in 2007; unclear when/where it was added for mingw.org headers, but it does seem to exist there as well (at least in versions from 2011).

This workaround stems from 53fbecce6e8b7d1f024e3dc6df4160fe9a577ff1 from 2004 - it is no longer relevant today.

>From 27fd50a795bbf58f2b6301d20e9623190378e0e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin at martin.st>
Date: Thu, 19 Jun 2025 14:11:22 +0300
Subject: [PATCH] [Support] Remove an outdated MinGW workaround

mingw-w64 has had the _HEAPOK define since the initial commits
in 2007; unclear when/where it was added for mingw.org headers,
but it does seem to exist there as well (at least in versions
from 2011).

This workaround stems from 53fbecce6e8b7d1f024e3dc6df4160fe9a577ff1
from 2004 - it is no longer relevant today.
---
 llvm/lib/Support/Windows/Process.inc | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/llvm/lib/Support/Windows/Process.inc b/llvm/lib/Support/Windows/Process.inc
index d525f5b16e862..c4d18ca7375f2 100644
--- a/llvm/lib/Support/Windows/Process.inc
+++ b/llvm/lib/Support/Windows/Process.inc
@@ -37,11 +37,6 @@
 //===          and must not be UNIX code
 //===----------------------------------------------------------------------===//
 
-#ifdef __MINGW32__
-// This ban should be lifted when MinGW 1.0+ has defined this value.
-#define _HEAPOK (-2)
-#endif
-
 using namespace llvm;
 
 Process::Pid Process::getProcessId() {