Remove unused HAVE_INET_NTOP

The inet_ntop() is always required and present via
931a8b0.

Author: petk

win32/build/config.w32.h.in

@@ -116,9 +116,8 @@
 /* Win32 support proc_open */
 #define PHP_CAN_SUPPORT_PROC_OPEN 1
 
-/* inet_ntop() / inet_pton() */
+/* inet_pton() */
 #define HAVE_INET_PTON 1
-#define HAVE_INET_NTOP 1
 
 /* vs.net 2005 has a 64-bit time_t.  This will likely break
  * 3rdParty libs that were built with older compilers; switch