Remove button after being clicked - php

Question

I have a page where the users can view their leave applications, I also have a Cancel button beside it which looks like this:
View Page
What I wanted to happen is that when I click on the cancel button, the status would change and the button would disappear.
I added a script that would make the button disappear and it worked, but it won't update the status.
So here's my form:
<div class="container">
<div class="page-header">
<h3>My Leaves</h3>
<div class="table-responsive">
<table class="table">
<tr>
<th>Employee Name</th>
<th>Phone</th>
<th>Email</th>
<th>From</th>
<th>To</th>
<th>Reason</th>
<th>Type</th>
<th>Status</th>
</tr>
<?php
include ('database.php');
$result = $database->prepare ("SELECT leaves.* FROM leaves INNER JOIN employee ON employee.id = leaves.user_id WHERE employee.username = '".$_SESSION["VALID_USER_ID"]."'");
$result ->execute();
for ($count=0; $row_message = $result ->fetch(); $count++){
?>
<tr>
<td><?php echo $row_message['firstname']." " .$row_message['lastname']; ?></td>
<td><?php echo $row_message['phone']; ?></td>
<td><?php echo $row_message['email']; ?></td>
<td><?php echo $row_message['fromdate']; ?></td>
<td><?php echo $row_message['todate']; ?></td>
<td><?php echo $row_message['reason']; ?></td>
<td><?php echo $row_message['type']; ?></td>
<td><?php echo $row_message['status']; ?></td>
<td>
<form method="post" action="update-leave-status-emp.php">
<input type="hidden" name="leaveno" value="<?php echo $row_message['leaveno']; ?>" />
<input type="submit" value="Cancelled" class="removebtn" name="cancelled"></input>
</form>
</td>
</tr>
<?php } ?>
</table>
<button type="button" class="btn btn-primary"><i class="glyphicon glyphicon-arrow-left"></i> Back</button>
</div>
</div>
</div>
</div>
</div>
And here's the script below:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$(".removebtn").click(function(){
$(this).remove();
});
});
</script>
PHP Code:
<?php
if(isset($_POST['cancelled']))
{
$msg = "Cancelled";
$status=$_POST['cancelled'];
}
$leaveno=$_POST['leaveno'];
$con = mysqli_connect('localhost', 'root', '');
mysqli_select_db($con, 'companydb');
$sql = "UPDATE leaves SET status = '$status' WHERE leaveno = '$leaveno'";
if(mysqli_query($con, $sql))
header("refresh:1; url=view-leave-emp.php?msg=$msg");
else
var_dump(mysqli_error($con));
?>