CODE EXAMPLE FOR CSS

how to remove default calendar icon

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
    <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
    <p>Date: <input type="text" id="datepicker"></p>
    <script>
    $(function(){
        $("#datepicker").datepicker({
            dateFormat: "yy-mm-dd"
        });
    });
    </script>