Keep only base/extractor.[cc|h].

third_party/minicrt/alloc2.cc

-//==========================================
-// LIBCTINY - Matt Pietrek 2001
-// MSDN Magazine, January 2001
-//==========================================
-#include "libctiny.h"
-#include <windows.h>
-#include <malloc.h>
-
-extern "C"
-#if _MSC_VER >= 1400
-__declspec(noalias restrict)
-#endif
-void * __cdecl realloc(void * p, size_t size) {
-    if (p)
-        return HeapReAlloc( GetProcessHeap(), 0, p, size );
-    else    // 'p' is 0, and HeapReAlloc doesn't act like realloc() here
-        return HeapAlloc( GetProcessHeap(), 0, size );
-}
-
-extern "C"
-#if _MSC_VER >= 1400
-__declspec(noalias restrict)
-#endif
-void * __cdecl calloc(size_t nitems, size_t size) {
-    return HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, nitems * size );
-}
-
-extern "C"
-#if _MSC_VER >= 1400
-  __declspec(noalias restrict)
-#endif
-void * __cdecl _recalloc(void * p, size_t nitems, size_t size) {
-    return realloc(p, nitems * size);
-}
-