Totally remove wiiuse hack for mingw.

It breaks versions with proper header file due to redeclaration error.
You should simply use current 4.9 version or 5.0 and newer for wiimote support.

lib/wiiuse/os_win.c

@@ -42,27 +42,6 @@
 #include <hidsdi.h>
 #include <setupapi.h>
 
-#if defined(__MINGW32__) && __GNUC__ < 5
-/* this prototype is missing from the mingw headers so we must add it
-	or suffer linker errors. */
-
-#ifndef HIDAPI
-#define HIDAPI
-#endif
-
-#ifndef BOOLEAN
-#define BOOLEAN BOOL
-#endif
-
-#	ifdef __cplusplus
-extern "C" {
-#	endif
-	HIDAPI BOOLEAN NTAPI HidD_SetOutputReport(HANDLE, PVOID, ULONG);
-#	ifdef __cplusplus
-}
-#	endif
-#endif
-
 int wiiuse_os_find(struct wiimote_t** wm, int max_wiimotes, int timeout) {
 	GUID device_id;
 	HANDLE dev;