headers: Remove obsolete 'defaults' directory

Signed-off-by: LIU Hao <lh_mouse@126.com>

mingw-w64-headers/defaults/generate.sh

diff --git a/mingw-w64-headers/defaults/generate.sh b/mingw-w64-headers/defaults/generate.sh
deleted file mode 100755
index b5bd081..0000000
--- a/mingw-w64-headers/defaults/generate.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh
-
-sed s/@MINGW_HAS_DDK@/0/ crt/sdks/_mingw_ddk.h.in > defaults/include/sdks/_mingw_ddk.h

mingw-w64-headers/defaults/include/sdks/_mingw_ddk.h

diff --git a/mingw-w64-headers/defaults/include/sdks/_mingw_ddk.h b/mingw-w64-headers/defaults/include/sdks/_mingw_ddk.h
deleted file mode 100644
index 93b2742..0000000
--- a/mingw-w64-headers/defaults/include/sdks/_mingw_ddk.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef MINGW_DDK_H
-#define MINGW_DDK_H
-#if 0
-#define MINGW_HAS_DDK_H 1
-#endif
-#endif