fix(timestamp): Remove deprecated aria-label input attributes.

BREAKING CHANGE: Old attributes do not conform with accessibility standards.

libs/barista-components/chart/src/timestamp/timestamp.ts

@@ -72,20 +72,6 @@ export class TimestampStateChangedEvent {
   },
 })
 export class DtChartTimestamp implements AfterViewInit, OnDestroy {
-  /**
-   * Aria label for the close button in the overlay.
-   * @deprecated `aria-label-close` does not conform with accessibility standards.
-   * Please use `ariaLabelClose` input instead.
-   * @breaking-change Will be removed in version 7.0.0
-   */
-  @Input('aria-label-close')
-  get depAriaLabelClose(): string {
-    return this._ariaLabelClose;
-  }
-  set depAriaLabelClose(value: string) {
-    this._ariaLabelClose = value;
-  }
-
   /** Aria label for the close button in the overlay */
   @Input()
   get ariaLabelClose(): string {
@@ -97,20 +83,6 @@ export class DtChartTimestamp implements AfterViewInit, OnDestroy {
   /** @internal Aria label value for the close button of the overlay */
   _ariaLabelClose = ARIA_DEFAULT_CLOSE_LABEL;
 
-  /**
-   * Aria label for the selected moment.
-   * @deprecated `aria-label-selected` does not conform with accessibility standards.
-   * Please use `ariaLabelSelected` input instead.
-   * @breaking-change Will be removed in version 7.0.0
-   */
-  @Input('aria-label-selected')
-  get depAriaLabelSelected(): string {
-    return this._ariaLabelSelected;
-  }
-  set depAriaLabelSelected(value: string) {
-    this._ariaLabelSelected = value;
-  }
-
   /** Aria label for the selected moment. */
   @Input()
   get ariaLabelSelected(): string {