replace PY_SIZE_MAX with SIZE_MAX
diff --git a/Include/pyport.h b/Include/pyport.h
index 2f78052..94c135f 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -115,16 +115,8 @@
typedef int Py_ssize_clean_t;
#endif
-/* Largest possible value of size_t.
- SIZE_MAX is part of C99, so it might be defined on some
- platforms. If it is not defined, (size_t)-1 is a portable
- definition for C89, due to the way signed->unsigned
- conversion is defined. */
-#ifdef SIZE_MAX
+/* Largest possible value of size_t. */
#define PY_SIZE_MAX SIZE_MAX
-#else
-#define PY_SIZE_MAX ((size_t)-1)
-#endif
/* Largest positive value of type Py_ssize_t. */
#define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))