fix(grid): remove toolbar exporter from MRL column layout grid (#16725)

Co-authored-by: Galina Edinakova <gedinakova@infragistics.com>

Author: mtsvyatkova

projects/igniteui-angular-elements/src/index.html

@@ -88,7 +88,6 @@ <h3 class="ig-typography__h6">Flat Grid (MRL column layout)</h3>
         <igc-grid-toolbar-actions>
             <igc-grid-toolbar-hiding></igc-grid-toolbar-hiding>
             <igc-grid-toolbar-pinning></igc-grid-toolbar-pinning>
-            <igc-grid-toolbar-exporter></igc-grid-toolbar-exporter>
         </igc-grid-toolbar-actions>
         </igc-grid-toolbar>