Completely separate C and C++ API of OpenCV core

samples/cpp/detection_based_tracker_sample.cpp

@@ -2,7 +2,6 @@
 
 #include <opencv2/core.hpp>
 #include <opencv2/core/utility.hpp>
-#include <opencv2/core/internal.hpp>
 #include <opencv2/imgproc.hpp>
 #include <opencv2/highgui.hpp>
 #include <opencv2/objdetect.hpp>

samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp

@@ -4,7 +4,7 @@
 #include <opencv2/core/core.hpp>
 #include <opencv2/imgproc/imgproc.hpp>
 #include <opencv2/highgui/highgui.hpp>
-#include <opencv2/core/utility.hpp>"
+#include <opencv2/core/utility.hpp>
 
 using namespace cv;  // The new C++ interface API is inside this namespace. Import it.
 using namespace std;