eliminated opencv_extra_api.hpp (all the functionality is moved to the regular OpenCV headers)

modules/calib3d/src/circlesgrid.cpp

@@ -1524,3 +1524,10 @@ size_t CirclesGridFinder::getFirstCorner(vector<Point> &largeCornerIndices, vect
 
   return cornerIdx;
 }
+
+bool cv::findCirclesGridDefault( InputArray image, Size patternSize,
+                             OutputArray centers, int flags )
+{
+    return findCirclesGrid(image, patternSize, centers, flags);
+}
+