快速完成工作，以防其他人需要这样做：

add_action(\'add_meta_boxes\', function() {
    add_action(\'admin_head\', function() {
        echo <<<EOS
<style type="text/css">
#visibility {
    display: none;
}
</style>

EOS;
    });
});

add_action(\'restrict_manage_posts\', function() {
    echo <<<EOS
<script type="text/javascript">
jQuery(document).ready(function($) {
    $("input[name=\'keep_private\']").parents("div.inline-edit-group:first").hide();
});
</script>

EOS;
});