Timepicker remove/hide default (30 mins)time interval HELPPP

HELPPP... want to hide or remove the default 30 min time interval from the dropdown list

$(function () {
        $('input.timepicker').timepicker({
            timeFormat: 'HH:mm',
         // interval: 15,  <--- still showing/displaying 30 mins interval
            minHour: 0,
            maxHour: 20,
            dropdown: true,
            dynamic: false,
        });
});

via Chebli Mohamed