winex11.drv: Remove an unneeded include.

dlls/winex11.drv/xdnd.c

diff --git a/dlls/winex11.drv/xdnd.c b/dlls/winex11.drv/xdnd.c
index cfb28ab..af04d75 100644
--- a/dlls/winex11.drv/xdnd.c
+++ b/dlls/winex11.drv/xdnd.c
@@ -32,7 +32,6 @@
 #include "wingdi.h"
 #include "winuser.h"
 #include "winerror.h"
-#include "wownt32.h"
 
 #include "x11drv.h"
 #include "shlobj.h"  /* DROPFILES */