feat(*): Add buttonText to changelog and remove unused import

Author: mddragnev

CHANGELOG.md

@@ -7,6 +7,8 @@ All notable changes for each version of this project will be documented in this
 ### New Features
 - `IgxCsvExporterService`, `IgxExcelExporterService`
     - Exporter services are no longer required to be provided in the application since they are now injected on a root level.
+- `IgxGridToolbarPinningComponent`, `IgxGridToolbarHidingComponent`
+    - Exposed new input `buttonText` which sets the text that is displayed inside the dropdown button in the toolbar.
 
 ### General
 

projects/igniteui-angular/src/lib/grids/column-actions/column-actions.component.ts

@@ -16,7 +16,6 @@ import { IgxColumnActionsBaseDirective } from './column-actions-base.directive';
 import { IgxCheckboxComponent } from '../../checkbox/checkbox.component';
 import { IColumnToggledEventArgs } from '../common/events';
 import { IgxGridBaseDirective } from '../grid-base.directive';
-import { DeprecateProperty } from '../../core/deprecateDecorators';
 
 let NEXT_ID = 0;
 /**