headers: Remove workarounds for undeffing _aligned_malloc

These workarounds stem from an earlier attempt to work around clashes
between _mm_malloc and _mm_free with _aligned_malloc, see
228f1adee765b7ff16575b816ad07745d3f2bc9b for where the earlier
"#define _aligned_malloc ..." workaround was removed.

Signed-off-by: Martin Storsjö <martin@martin.st>

(cherry picked from commit f70a833750e95f4a3de8d37c9b6ba6403cea0e04)

mingw-w64-headers/crt/malloc.h

diff --git a/mingw-w64-headers/crt/malloc.h b/mingw-w64-headers/crt/malloc.h
index 24e3e56..e73b705 100644
--- a/mingw-w64-headers/crt/malloc.h
+++ b/mingw-w64-headers/crt/malloc.h
@@ -53,7 +53,7 @@
   extern unsigned int _amblksiz;
 
 /* Make sure that X86intrin.h doesn't produce here collisions.  */
-#if (!defined (_XMMINTRIN_H_INCLUDED) && !defined (_MM_MALLOC_H_INCLUDED)) || defined(_aligned_malloc)
+#if (!defined (_XMMINTRIN_H_INCLUDED) && !defined (_MM_MALLOC_H_INCLUDED))
 #define __DO_ALIGN_DEFINES
 #endif
 
@@ -61,13 +61,6 @@
 #define _MM_MALLOC_H_INCLUDED
 #endif
 
-#ifdef __DO_ALIGN_DEFINES
-#pragma push_macro("_aligned_free")
-#pragma push_macro("_aligned_malloc")
-#undef _aligned_free
-#undef _aligned_malloc
-#endif
-
 #define _mm_free(a) _aligned_free(a)
 #define _mm_malloc(a,b) _aligned_malloc(a,b)
 
@@ -91,14 +84,6 @@
   _CRTIMP void *__cdecl _aligned_offset_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment,size_t _Offset);
 #endif
 
-#ifdef __DO_ALIGN_DEFINES
-#undef __DO_ALIGN_DEFINES
-
-#pragma pop_macro("_aligned_malloc")
-#pragma pop_macro("_aligned_free")
-
-#endif
-
 /* Users should really use MS provided versions */
 void * __mingw_aligned_malloc (size_t _Size, size_t _Alignment);
 void __mingw_aligned_free (void *_Memory);

mingw-w64-headers/crt/stdlib.h

diff --git a/mingw-w64-headers/crt/stdlib.h b/mingw-w64-headers/crt/stdlib.h
index f414f25..a0997c4 100644
--- a/mingw-w64-headers/crt/stdlib.h
+++ b/mingw-w64-headers/crt/stdlib.h
@@ -532,15 +532,9 @@
   void *__cdecl realloc(void *_Memory,size_t _NewSize);
   _CRTIMP void *__cdecl _recalloc(void *_Memory,size_t _Count,size_t _Size);
 /* Make sure that X86intrin.h doesn't produce here collisions.  */
-#if (!defined (_XMMINTRIN_H_INCLUDED) && !defined (_MM_MALLOC_H_INCLUDED)) || defined(_aligned_malloc)
-#pragma push_macro("_aligned_free")
-#pragma push_macro("_aligned_malloc")
-#undef _aligned_free
-#undef _aligned_malloc
+#if (!defined (_XMMINTRIN_H_INCLUDED) && !defined (_MM_MALLOC_H_INCLUDED))
   _CRTIMP void __cdecl _aligned_free(void *_Memory);
   _CRTIMP void *__cdecl _aligned_malloc(size_t _Size,size_t _Alignment);
-#pragma pop_macro("_aligned_free")
-#pragma pop_macro("_aligned_malloc")
 #endif
   _CRTIMP void *__cdecl _aligned_offset_malloc(size_t _Size,size_t _Alignment,size_t _Offset);
   _CRTIMP void *__cdecl _aligned_realloc(void *_Memory,size_t _Size,size_t _Alignment);