Deleting statuses is part of workflow.
A default status cannot be deleted. Make another status default prior to deletion.
You cannot delete a status currently assigned to an item (Portfolio, Project, Task, issue, or Request).
To delete a status:
- Go to User Menu | Settings | System Lists | Workflow.
- Click the dustbin button next to the status you want to delete.
- Confirm the deletion.
A deleted status cannot be restored.