crt: Remove unused/unnecessary declarations of _commode in internal.h

Signed-off-by: Martin Storsjö <martin@martin.st>

mingw-w64-crt/include/internal.h

diff --git a/mingw-w64-crt/include/internal.h b/mingw-w64-crt/include/internal.h
index 9439eaf..205d30d 100644
--- a/mingw-w64-crt/include/internal.h
+++ b/mingw-w64-crt/include/internal.h
@@ -18,12 +18,6 @@
 
 #pragma pack(push,_CRT_PACKING)
 
-#if defined (SPECIAL_CRTEXE) && (defined (_DLL) || defined (__GNUC__))
-  extern int _commode;
-#else
-  __declspec(dllimport) extern int _commode;
-#endif
-
 #define __IOINFO_TM_ANSI 0
 #define __IOINFO_TM_UTF8 1
 #define __IOINFO_TM_UTF16LE 2