Currently, there is no way to delete these type of pages within the Luminate Online interface. While the page won't be immediately visible unless you have configured this page to be accessible through the TeamRaiser navigation bar, Google may still index the page and it may be accessible through search.

You can use a robots.txt file in your file structure to hide the pages you don't want indexed by following this link. In addition to this, you can request Google to remove the content by visiting this website.