DataItem: rm redundant virtual

GUI/Model/Data/DataItem.h

@@ -116,7 +116,7 @@ public:
     void setYaxisTitle(const QString& title);
 
     //! Sets zoom range of x,y axes to axes of input data
-    virtual void setAxesRangeToData();
+    void setAxesRangeToData();
 
     //! Returns dimensions and axesbins of data
     virtual std::vector<int> shape() const = 0;