We removed the top favorites section from your favorites list to simplify the way you access your favorite pages in Salesforce. Favorites give you instant access to important records, lists, groups, dashboards, and other frequently used pages. Turns out, top favorites wasn't your favorite way to use favorites. You no longer see top favorites because we're focused on the features that matter to you most and, based on your feedback, this one didn't. This change applies to Lightning Experience only.