Eliminate compiler warning
diff --git a/MagickCore/studio.h b/MagickCore/studio.h
index 44b0f39..58e3b6e 100755
--- a/MagickCore/studio.h
+++ b/MagickCore/studio.h
@@ -120,7 +120,6 @@
#if defined(MAGICKCORE_THREAD_SUPPORT)
# include <pthread.h>
#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
-# define MAGICKCORE_WINDOWS_SUPPORT 1
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
diff --git a/MagickWand/studio.h b/MagickWand/studio.h
index 7a67fad..81ff36a 100644
--- a/MagickWand/studio.h
+++ b/MagickWand/studio.h
@@ -126,7 +126,6 @@
#if defined(MAGICKCORE_THREAD_SUPPORT)
# include <pthread.h>
#elif defined(MAGICKWAND_WINDOWS_SUPPORT)
-# define MAGICKCORE_WINDOWS_SUPPORT 1
#include <windows.h>
#endif
#if defined(MAGICKCORE_HAVE_SYS_SYSLIMITS_H)