Make core/internal.hpp a private header

modules/gpu/src/precomp.hpp

@@ -47,10 +47,6 @@
     #pragma warning( disable: 4251 4710 4711 4514 4996 )
 #endif
 
-#ifdef HAVE_CVCONFIG_H
-    #include "cvconfig.h"
-#endif
-
 #include <cstring>
 #include <iostream>
 #include <limits>
@@ -71,9 +67,10 @@
 #include "opencv2/imgproc.hpp"
 #include "opencv2/imgproc/imgproc_c.h"
 #include "opencv2/calib3d.hpp"
-#include "opencv2/core/internal.hpp"
 #include "opencv2/video.hpp"
 
+#include "opencv2/core/private.hpp"
+
 #if defined WIN32 || defined WINCE
     #include <windows.h>
     #undef small