When you’ve finished working in a folder and would like to delete it, you’ll be able to do so easily from the organization’s project index.
Deleting a folder will likewise archive any project within it. You can either move those projects out of the folder beforehand or restore them from the Archived Projects menu after they’ve been archived.
Click on the Trash icon next to the specific folder you’d like to delete.
A dialog box will appear asking you if you’d like to remove the folder including the projects under that folder. Click Remove to complete the deletion.