grif0077,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
</head>
<body>
<div class="main">1</div>
<div class="main"><ul class="list-brands"><li class="breand" style="width: 268px;">2</li></ul></div>
<div class="main">3</div>
<script>
window.setTimeout(function() {
var coll = document.querySelectorAll(".main");
for (var i = 0, len = coll.length; i < len; i++) {
coll[i].querySelector(".breand") || coll[i].remove();
}
}, 1000);
</script>
</body>
</html>