cmdutils: remove duplicate windows.h include

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

cmdutils.c

@@ -231,7 +231,6 @@ static const OptionDef *find_option(const OptionDef *po, const char *name)
  * by default. HAVE_COMMANDLINETOARGVW is true on cygwin, while
  * it doesn't provide the actual command line via GetCommandLineW(). */
 #if HAVE_COMMANDLINETOARGVW && defined(_WIN32)
-#include <windows.h>
 #include <shellapi.h>
 /* Will be leaked on exit */
 static char** win32_argv_utf8 = NULL;