mem-win: Remove unneeded includes and definitions.

Removes fsync definition and includes that are not needed
for the functionality contained in mem-win.c.

Signed-off-by: Broc Going<bgoing@micron.com>

Author: brgoing

libnvme/src/nvme/mem-win.c

@@ -7,24 +7,17 @@
  */
 
 #include <string.h>
-#include <errno.h>
-#include <limits.h>
 #include <malloc.h>
 
-#include <io.h>
 #include <memoryapi.h>
 #include <sysinfoapi.h>
-#include <winsock2.h>	/* for gethostname */
 
 #include "compiler-attributes.h"
 #include "mem.h"
 #include "private.h"
 
 #define HUGE_MIN 0x80000 /* policy threshold when large pages unavailable */
 
-/* unistd.h POSIX compatibility */
-
-#define fsync _commit
 static int getpagesize(void)
 {
 	SYSTEM_INFO si;