refactor(drp): remove aria-hidden from icons as #16008 has been addressed

Author: ddaribo

projects/igniteui-angular/src/lib/date-range-picker/date-range-picker.component.html

@@ -16,11 +16,11 @@
 </ng-template>
 
 <ng-template #defIcon>
-    <igx-icon family="default" name="date_range" [attr.aria-hidden]="true"></igx-icon>
+    <igx-icon family="default" name="date_range"></igx-icon>
 </ng-template>
 
 <ng-template #clearIcon>
-    <igx-icon family="default" name="input_clear" [attr.aria-hidden]="true"></igx-icon>
+    <igx-icon family="default" name="input_clear"></igx-icon>
 </ng-template>
 
 <ng-template #defDateSeparatorTemplate>{{ dateSeparator }}</ng-template>