docs: Remove obsolete screenshot

Author: dimodi

components/chart/types/area.md

@@ -83,10 +83,6 @@ You can render the lines between the points with different styles. The supported
 * `Step`—The style renders the connection between data points through vertical and horizontal lines. It is suitable for indicating that the value is constant between the changes.
 * `Smooth`—This style causes the Area Chart to display a fitted curve through data points. It is suitable when the data requires to be displayed with a curve, or when you wish to connect the points with smooth instead of straight lines.
 
->caption Comparison between line styles
-
-![](images/area-chart-step-and-smooth.png)
-
 @[template](/_contentTemplates/chart/link-to-basics.md#configurable-nested-chart-settings)
 
 @[template](/_contentTemplates/chart/link-to-basics.md#configurable-nested-chart-settings-categorical)