JSFiddle - React, Tailwind, and code Playground

HTML

<div class="mydiv"> <a href="#" id="demo"> Mr Blue has a blue house, (0123dddddd4) and/ a blue car </a> 
</div>
<div class="mydiv"> <a href="#" id="demo1"> Mr Blue has a blue house, (0123dddddd4) and/ a blue car </a> 
</div>

JavaScript

function limpar(el) {
    var str = el.innerHTML;
    var res = str.replace(/\(.*\)/, '');
    el.innerHTML = res;
}

var links = document.querySelectorAll('.mydiv a');
[].forEach.call(links, limpar);