[fix issue #3996] delete private.hpp include in sample code
@ -42,7 +42,6 @@
#include <opencv2/line_descriptor.hpp>
#include "opencv2/core/utility.hpp"
#include "opencv2/core/private.hpp"
#include <opencv2/imgproc.hpp>
#include <opencv2/features2d.hpp>
#include <opencv2/highgui.hpp>