Exclude Author by ID

Where $that_user_your_filtering_out is the user/author ID you wan’t to filter out, make this modification to your loop

foreach ($blogusers as $bloguser) {
    // modification starts here
    if($bloguser->user_id == $that_user_your_filtering_out){
        continue;
    }
    // modification ends here
    echo '<div class="content-slider-body">';
    $user = get_userdata($bloguser->user_id);