I don’t think you can get rid of the existence of the subpages themselves, but you can “hide” easy user access to them by using CSS. So, for example, if you want to remove links to them from the hamburger menu, you can use CSS, like
.hamburger-panel a.widget-link.about-link {
display: none;
}
and
.hamburger-panel a.faq-priority.widget-link {
display: none;
}