jquery datepicker删除当日高亮显示类

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.13.0/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/ui/1.13.0/jquery-ui.js"></script>

<input type="text" id="datepicker">

$(function() {
  $("#datepicker").datepicker({
    onSelect: function(dateText, inst) {
      // 当选择日期时触发的回调函数
    },
    beforeShowDay: function(date) {
      var today = new Date();
      if (date.getDate() === today.getDate() && date.getMonth() === today.getMonth() && date.getFullYear() === today.getFullYear()) {
        return [true, "highlight", "当日"];
      }
      return [true, "", ""];
    }
  });
});

.highlight {
  background-color: yellow;
}