JSFiddle - React, Tailwind, and code Playground

HTML

<div class="FixedHeader_Cloned fixedHeader FixedHeader_Header">3331</div>
<div class="FixedHeader_Cloned fixedHeader FixedHeader_Header">2</div>
<div class="FixedHeader_Cloned fixedHeader FixedHeader_Header">3</div>
<div class="FixedHeader_Cloned fixedHeader FixedHeader_Header">4</div>

JavaScript

$(".FixedHeader_Cloned").each(function(i, e) {
    if (i > 0) {
        e.remove();
    }
});