If you no longer need a project or any of the data in it, you should delete it.
Deleting a project deletes all of the data within it, with the exception of source
code data, which is maintained separately from the rest of the site's content.
CAUTION:
Delete a project only if you are sure that you no longer need any of
the data within it. Move any items that you want to save.
Note:
- You can delete a parent project only when its members, user groups and roles
are not in use in any other project.
- When you delete a parent project, the direct subprojects are moved one level
up; that is, under the immediate parent of the deleted project.
- If the deleted project has no parent, its subprojects become root-level
projects.
The project is deleted.