refactor: update examples

src/views/charts/index.js

@@ -1,6 +1,3 @@
-import CChartLineSimple from './CChartLineSimple'
-import CChartLineSimplePointed from './CChartLineSimplePointed'
-import CChartBarSimple from './CChartBarSimple'
 import CChartLineExample from './CChartLineExample'
 import CChartBarExample from './CChartBarExample'
 import CChartDoughnutExample from './CChartDoughnutExample'
@@ -9,13 +6,10 @@ import CChartPieExample from './CChartPieExample'
 import CChartPolarAreaExample from './CChartPolarAreaExample'
 
 export {
-  CChartLineSimple,
-  CChartLineSimplePointed,
-  CChartBarSimple,
   CChartLineExample,
   CChartBarExample,
   CChartDoughnutExample,
   CChartRadarExample,
   CChartPieExample,
   CChartPolarAreaExample
-}
+}