Remove the "Logged in as {username}. Log Out?" link from the WordPress comment form.

remove-logout-link-wp-comment-form.php

<?php //* Mind this opening PHP tag

// Remove the logout link in comment form
add_filter( 'comment_form_logged_in', '__return_empty_string' );

Hello,

You need to put this in your functions.php This method catch the login field and remove it from the form !

add_filter( 'comment_form_logged_in', 'unset_login_field' );
function unset_login_field($fields){
    unset($fields);
    return $fields;
}

this solved my problem thank you :D