Untitled

Why can't I remove this form?
<input type="button" value="Delete Row" class="removePlacement button blue" />

<div id="placement">
<form id="placement-form" class="placement-form">
    <!-- items -->
</form>
 <form id="placement-form1" class="placement-form">
    <!-- items -->
</form>
 <form id="placement-form2" class="placement-form">
    <!-- items -->
</form>
 <form id="placement-form3" class="placement-form">
    <!-- items -->
</form>
</div>

$(function() {
$('.removePlacement').click(function() {
    $('#placement').remove('form').last();
    // alert('0');
    });
});

$(function() {
    $('.removePlacement').click(function() {
        $('#placement').find("form:last").remove();
        // alert('0');
    });
});

$('#placement').remove('form').last();