diff --git a/stats/zvalues.h b/stats/zvalues.h
index d6e9c7d60..58222f5ab 100644
--- a/stats/zvalues.h
+++ b/stats/zvalues.h
@@ -2,19 +2,9 @@
 // Defines the z-values of features in the chart view.
 // Objects with higher z-values are painted on top of objects
 // with smaller z-values. For the same z-value objects are
-// drawn in order of addition to the graphics scene.
+// drawn in order of addition to the scene.
 #ifndef ZVALUES_H
 
-struct ZValues {
-	static constexpr double grid = -1.0;
-	static constexpr double series = 0.0;
-	static constexpr double axes = 1.0;
-	static constexpr double seriesLabels = 2.0;
-	static constexpr double chartFeatures = 3.0;	// quartile markers and regression lines
-	static constexpr double informationBox = 4.0;
-	static constexpr double legend = 5.0;
-};
-
 enum class ChartZValue {
 	Grid = 0,
 	Series,