As Ben Rowe points out in the comments, value is not a valid attribute of the div tag. And both the jQuery solution and the solution that uses getElementsByTagName() has to iterate through a list, which is bad for performance. I think that creating an id attribute instead is a better option:

<div id="task_row_0" class="task_row"></div>

And then you can just do:

var div = document.getElementById("task_row_" + taskId);
div.parentNode.removeChild(div);

this is jquery code )):

$('div').each(function(){
  if($(this).attr('value') == '0'){
    $(this).remove();
  }
});

var divs = document.getElementsByTagName('div');
for(var i = divs.length; i; i -= 1) {
    if (divs[i].getAttribute('value') == 0) {
        divs[i].parentNode.removeChild(divs[i]);
    }
}