morgusha,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
jQuery(function() {
jQuery('.del_sl').text((i, txt) => txt.replace(/[\/]/g, ''));
});
</script>
</head>
<body>
<table>
<tr>
<td class="del_sl">/test1</td>
</tr>
<tr>
<td class="del_sl">/test2</td>
</tr>
<tr>
<td class="del_sl">/test3</td>
</tr>
<tr>
<td class="del_sl">/test4</td>
</tr>
<tr>
<td class="del_sl">/test5</td>
</tr>
</table>
</body>
</html>