jQuery - væk med paranteser i tekst

<script
  src="https://code.jquery.com/jquery-2.2.4.min.js"
  integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
  crossorigin="anonymous">
</script>

<script type="text/javascript">

function stripParenthesis( node ) {
    if(node.length) {
        node.contents().each(function(index, child) {
            if( child.nodeType === 3 ) {
                child.nodeValue = child.nodeValue.replace(/\(|\)/g, '');
            }
            else {
                stripParenthesis( $(child) );
            }
        });
    }
}

jQuery(document).ready(function($) {

stripParenthesis( $('a:contains("Opskriftsgruppe")').closest( "span" ) );

$('a:contains("Opskriftsgruppe")').css('display', 'none');

$('a:contains("Opskriftsgruppe")').closest( "span" ).css({ "font-size": "21px", "line-height": "3" });

});

</script>