remove aria labels on nav steps

src/app/features/administration/nav-steps/nav-steps.component.html

@@ -4,7 +4,6 @@
 			*ngIf="display_previous_button"
 			id="button_next_step"
 			class="button-previous is-secondary"
-			[attr.aria-label]="'nav.previous' | translate"
 			[routerLink]="['/administration/step/' + previous_step_number]"
 		>
 			{{ 'nav.previous' | translate }}
@@ -14,7 +13,6 @@
 			id=""
 			class="button-next pull-right"
 			[disabled]="next_is_disabled"
-			[attr.aria-label]="(is_finish_step ? 'nav.save' : 'nav.next') | translate"
 			[ngClass]="{ 'is-finish': is_finish_step, 'is-primary': !is_finish_step }"
 			[routerLink]="['/administration/step/' + next_step_number]"
 			(click)="runNextAction()"