disbale end time in clockpicker code example

Example: clockpicker

<div class="input-group clockpicker">
    <input type="text" class="form-control" value="09:30">
    <span class="input-group-addon">
        <span class="glyphicon glyphicon-time"></span>
    </span>
</div>
<script type="text/javascript">
$('.clockpicker').clockpicker();
</script>