When attempting to delete a feature workflow status, you receive the error, "Status cannot be deleted because it is in use by some records". You have already checked that no features are set to this status.
Requirements also use the feature status workflow and in this case, some requirements are using this status.
You can quickly create a Reports List view that will show your requirements.
- Click the "+ New Report" button
- Add the following columns
- Feature name
- Requirements name and status
- Filter by your product if you have more than one product
- Filter by status if you so desire
- Alternatively you may simply sort by status as shown