unset_agent_info_windows.go
func unsetenvGPGAgentInfo() {
	v := C.CString("GPG_AGENT_INFO=")
	defer C.free(unsafe.Pointer(v))
	C.putenv(v)
}
func unsetenvGPGAgentInfo() {
	v := C.CString("GPG_AGENT_INFO=")
	defer C.free(unsafe.Pointer(v))
	C.putenv(v)
}
// unsetenv is not available in mingw