PivotGrid: update Bind Data topic (#6770) (#6773)

concepts/05 UI Components/PivotGrid/030 Data Binding/20 Bind Data.md

@@ -1,18 +1,10 @@
-Regardless of the approach you've chosen to provide data, after implementing a data source, bind it to the PivotGrid UI component using the [dataSource](/api-reference/10%20UI%20Components/GridBase/1%20Configuration/dataSource.md '/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/#dataSource') property as demonstrated below. 
+After selecting a data source method, connect it to the PivotGrid UI component with the [dataSource](/api-reference/10%20UI%20Components/GridBase/1%20Configuration/dataSource.md '/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/#dataSource') property as shown in the following demos:
 
-It is also recommended that you declare the [fields](/api-reference/30%20Data%20Layer/PivotGridDataSource/1%20Configuration/fields '/Documentation/ApiReference/Data_Layer/PivotGridDataSource/Configuration/fields/') array and describe data from the DataSource for the PivotGrid UI component there.
-
-	<!--JavaScript-->var pivotGridDataSource = {
-		store: {
-			//...
-		},		
-		fields: [{
-			//...
-		},
-		//...
-		],
-	};
-
-	var dxPivotGridOptions = {
-		dataSource: pivotGridDataSource
-	};
+#include common-demobutton-named with {
+    url: "https://js.devexpress.com/Demos/WidgetsGallery/Demo/PivotGrid/SimpleArray/",
+    name: "Bind an Array"
+}
+#include common-demobutton-named with {
+    url: "https://js.devexpress.com/Demos/WidgetsGallery/Demo/PivotGrid/OLAPDataSource/",
+    name: "Bind an OLAP Service"
+}