Удалить required

function ok() { 
  $('[id^="stol"]').removeAttr("required"); 
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> 
<input type="radio" name="1" id="stol[1]" required> 
<input type="radio" name="1" id="stol[2]" required><br> 
<a onclick="ok()">Удалить required</a>

function ok() { 
  $('[id^="stol"]').prop("required", false); 
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> 
<form onsubmit="console.log('submitted'); return false"> 
  <input type="radio" name="1" id="stol[1]" required> 
  <input type="radio" name="1" id="stol[2]" required><br> 
  <a onclick="ok()">Удалить required</a> 
  <input type="submit" value="Submit" /> 
</form>

function ok() { 
  $('[id^="stol"]').removeAttr("required"); 
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> 
<form onsubmit="console.log('submitted'); return false"> 
  <input type="radio" name="1" id="stol[1]" required> 
  <input type="radio" name="1" id="stol[2]" required><br> 
  <a onclick="ok()">Удалить required</a> 
  <input type="submit" value="Submit" /> 
</form>