To delete an album in Family Tree builder, please do the following:
1. Open your project in Family Tree Builder.
2. Click ‘Photos’ icon in the main toolbar to go to the ‘Photos’ section.
3. In the ‘Albums’ tab, click the album that you want to remove, and then click the ‘Delete’ button.
Note: This action does not delete any photos from your project, but only the album. Any photo that is in this album will remain in your family tree, and you can see them in the list of all photos you have added to your project.
If you wish to delete the photos completely from the project see this FAQ: How do I delete a photo in Family Tree Builder?