Deleting Sections
To delete a section, select File > Delete from the menu bar. A dialog is displayed asking what you want to do with any content items that belong to the section (that is, content items that have this section as their home section). You can either move the content items to a new home section, or allow them to be deleted along with the section.
When a section is deleted it is not just marked as deleted, it is actually deleted from the database and cannot be undeleted. This is also the case for any content items that you allow to be deleted with the section, so think carefully before you act when using this function.