fix typo

src/app/showcase/doc/listbox/accessibilitydoc.ts

@@ -10,7 +10,6 @@ import { Code } from '../../domain/code';
                 Value to describe the component can be provided <i>ariaLabelledBy</i> or <i>ariaLabel</i> props. The list element has a <i>listbox</i> role with the <i>aria-multiselectable</i> attribute that sets to true when multiple selection is
                 enabled. Each list item has an <i>option</i> role with <i>aria-selected</i> and <i>aria-disabled</i> as their attributes.
             </p>
-            <p>If filtering is enabled, <i>filterInputProps</i> can be defined to give <i>aria-*</i> props to the input element. Alternatively <i>filterPlaceholder</i> is usually utilized by the screen readers as well.</p>
         </app-docsectiontext>
 
         <app-code [code]="code" [hideToggleCode]="true" [hideCodeSandbox]="true" [hideStackBlitz]="true"></app-code>