offline, you can import your own back up files to restore a deleted project.If you delete an online project, you will not be able to restore it yourself, even if you have backup files.
You would need to get more help to restore an online project you deleted.
If you work alone offline, you can import your own back up files to restore a deleted project.
If you are sure you will not want your online audio project, or you work offline alone, then do these steps:
On the home page, click 
(More) on the audio project card for the audio project you want to delete.
Click 
Delete.
The Confirmation dialog box appears.
Click Yes.