core: cv::Range() ostream write operator

remove from DNN module headers

modules/dnn/include/opencv2/dnn/shape_utils.hpp

@@ -42,8 +42,8 @@
 #ifndef OPENCV_DNN_DNN_SHAPE_UTILS_HPP
 #define OPENCV_DNN_DNN_SHAPE_UTILS_HPP
 
-#include <opencv2/core.hpp>
-#include <opencv2/core/types_c.h>
+#include <opencv2/dnn/dnn.hpp>
+#include <opencv2/core/types_c.h>  // CV_MAX_DIM
 #include <iostream>
 #include <ostream>
 #include <sstream>
@@ -52,12 +52,6 @@ namespace cv {
 namespace dnn {
 CV__DNN_EXPERIMENTAL_NS_BEGIN
 
-//Useful shortcut
-inline std::ostream &operator<< (std::ostream &s, cv::Range &r)
-{
-    return s << "[" << r.start << ", " << r.end << ")";
-}
-
 //Slicing
 
 struct _Range : public cv::Range