In each per-site meta, under the Settings tab we can see the list of menus.
In per-site meta, PERSONAL INFORMATION is not clickable, i.e. doesn't have any sub menu items. Maybe the menu title is copied from main site, where it has Edit Profile option in it and the tab name is Edit Profile & Settings.
Since in the per-site meta we are not able to modify any information about the user profile, so the unused menu title can be removed from the Settings tab in the per-site metas.
Screenshot from Meta Stack Overflow: