.widget .unslider li, .unslider li {margin: 0;padding: 0;border: 0;clear: none;} 
.custom-slider>ul>li:not(:first-child) {display:none;}
.custom-slider>ul{list-style: none;}

/* https://www.smashingmagazine.com/2009/07/the-definitive-guide-to-using-negative-margins/ */
.custom-slider.unslider-fade ul li { position: relative; float: left; margin-right: -100%; width: 100%; }