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>