<input list="accountsdeb" name="deblist[1]" id="deblist" autocomplete="off">
<input list="accountsdeb" name="deblist[2]" id="deblist" autocomplete="off">

function remove1() {
  var dbl = document.querySelectorAll('#deblist').length;
  var dbla = dbl;
  var elem = document.getElementsByName("deblist["+dbla+"]");
  alert(dbla);
  //var last = debelelast - 1;
  elem.parentNode.removeChild(elem);
}

var elem = document.getElementById("myDiv");
elem.parentNode.removeChild(elem);