wordpress，ajax =不行

I asked a similar question with good advise to help me, but i have run into another problem with the same code. What I am looking to do is simply click a button on a users profile and change the default "0", meaning they're not banned, to a "1". Before I was using a hook and a "do_action" with no problems, now I am trying to use ajax. I will start by posting my code.

FUNCTION

add_action( 'wp_ajax_remove_account', 'remove_account' );
function remove_account() {
    global $wpdb;
    global $current_user;
    $author = get_queried_object();
    $uid = $author->ID;
    $user = $current_user->ID;
    $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->users SET removed = '%d' WHERE ID = '%d'", '1', $user ));
    wp_die();
}

AJAX

jQuery(document).ready(function($) {
    $('.wordpress-ajax-form').on('submit', function(e) {
    e.preventDefault();
    var $form = $(this);
    $.post($form.attr('action'), $form.serialize(), function(data) {
    }, 'json');
}); });

FORM

<form class="wordpress-ajax-form" method="post" action="<?php echo        AJAX_URL; ?>" >
<input type="hidden" name="action" value="remove_account" ><br>
<center><button id="msgbutton">Remove Account</button></center>
</form>

The above will work fine, however if I change

$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->users SET removed = '%d' WHERE ID = '%d'", '1', $user ));

to

$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->users SET removed = '%d' WHERE ID = '%d'", '1', $uid ));

to get the user id of the profile I'm looking at, it doesn't work.

I added

$author = get_queried_object();
echo $author->ID;`

to my header and it gave me back the user id of the profile i was looking at so I know that code works. Any help is appreciated.