Only Admins can delete the Workspace.
To delete the entire workspace, you must first remove all other Members. This can be done in the Members section of the Settings.
Once complete, navigate to the "My Account" section and scroll down to the bottom.
Clicking on Delete account
will show a pop-up window asking you to confirm the action by entering your account password.
Please note that this action will delete your Workspace and its data. It is permanent and cannot be undone.