JSFiddle - React, Tailwind, and code Playground

HTML

<div id="usersec">
<TABLE style="TEXT-ALIGN: center; WIDTH: 279px; HEIGHT: 70px">
<TBODY>
<TR>
<TD style="FONT-FAMILY: Verdana" vAlign=center align=middle id="cellToChange">Talk to me</TD>
</TR></TBODY></TABLE>
</div>

<div class="ss">
<form method="post" action="/?w3tc_note=flush_all"><p id="sss">Email *<br><span class="ed_css_txt"><input class="ed_tb_css" name="ed_txt_em" id="ed_txt_em" value="" maxlength="225" type="text" placeholder="Email Address"></span></p><p><input class="ed_bt_css" name="ed_btn" id="ed_btn" value="Send Download Link" type="submit"><input name="ed_txt_id" id="ed_txt_id" value="wmasfd-gjmkew-udphom-olsmpb-wjdpbz" type="hidden"></p><input type="hidden" id="_wpnonce" name="_wpnonce" value="fd10496605"><input type="hidden" name="_wp_http_referer" value="/?w3tc_note=flush_all"></form></div>

JavaScript

var container = document.getElementByClass('ss');
//var td = container.querySelector('p');
alert(container);
if(td){
td.remove();
}