You can delete any project that is open in the 'shared tasks' section.
To delete a project, follow these steps:
Click the Groups tab on the left navigation bar. To scroll down, click the arrow button.
Click the Group Memberships icon. The Active Memberships page appears.
Select the group in which you would like to delete a project. The Group homepage appears.
Click the Shared Tasks button. The Shared Tasks page appears.
In the Modify column of the project you want to delete, click the delete link.
Note: All
project deletions are immediate and permanent. You do not have the opportunity
to retrieve a deleted project. By default, pressing the delete link deletes
the item without any confirmation. You can change the settings of the
delete button through the General
Preferences
topic of this help file.