win32 clean remove leftover ifdef

Signed-off-by: Andy Green <andy.green@linaro.org>
diff --git a/lib/lws-plat-win.c b/lib/lws-plat-win.c
index cd67f71..97bced6 100644
--- a/lib/lws-plat-win.c
+++ b/lib/lws-plat-win.c
@@ -1,7 +1,6 @@
 static unsigned long long
 time_in_microseconds()
 {
-#if defined(WIN32) || defined(_WIN32)
 #define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
 	FILETIME filetime;
 	ULARGE_INTEGER datetime;