public function deleteRevision($contentId, $revisionId)
    {
        $this->loadModel('Content.ContentRevisions');
        $revision = $this->ContentRevisions->find()
            ->where(['id' => $revisionId, 'content_id' => $contentId])
            ->first();

        if ($this->ContentRevisions->delete($revision, ['atomic' => true])) {
            $this->Flash->success(__d('content', 'Revision was successfully removed!'));
        } else {
            $this->Flash->danger(__d('content', 'Unable to remove this revision, please try again.'));
        }

        $this->title(__d('content', 'Editing Content Revision'));
        $this->redirect($this->referer());
    }