silverstripe-cms/code/Controllers/CMSSiteTreeFilter_StatusRemovedFromDraftPages.php

<?php

namespace SilverStripe\CMS\Controllers;

use SilverStripe\CMS\Model\SiteTree;
use SilverStripe\ORM\SS_List;
use SilverStripe\Versioned\Versioned;

/**
 * Filters pages which have a status "Removed from Draft".
 */
class CMSSiteTreeFilter_StatusRemovedFromDraftPages extends CMSSiteTreeFilter
{

    public static function title()
    {
        return _t(__CLASS__ . '.Title', 'Live but removed from draft');
    }

    /**
     * Filters out all pages who's status is set to "Removed from draft".
     *
     * @return SS_List
     */
    public function getFilteredPages()
    {
        $pages = Versioned::get_including_deleted(SiteTree::class);
        $pages = $this->applyDefaultFilters($pages);
        $pages = $pages->filterByCallback(function (SiteTree $page) {
            // If page is removed from stage but not live
            return $page->isOnLiveOnly();
        });
        return $pages;
    }
}