highgui module: removed unused type_mouse_event mouse_wheel

modules/highgui/src/window_QT.h

@@ -366,7 +366,7 @@ private slots:
 };
 
 
-enum type_mouse_event { mouse_up = 0, mouse_down = 1, mouse_dbclick = 2, mouse_move = 3, mouse_wheel = 3 };
+enum type_mouse_event { mouse_up = 0, mouse_down = 1, mouse_dbclick = 2, mouse_move = 3 };
 static const int tableMouseButtons[][3]={
     {CV_EVENT_LBUTTONUP, CV_EVENT_RBUTTONUP, CV_EVENT_MBUTTONUP},               //mouse_up
     {CV_EVENT_LBUTTONDOWN, CV_EVENT_RBUTTONDOWN, CV_EVENT_MBUTTONDOWN},         //mouse_down