Log in to the HTML5 client.
Select the Deliverables Center workspace, Deliverables Grid.
Click on the Open button available on the right-hand side of the Deliverable Name to open the Deliverable Card.
In the Deliverable Card, click on the More (
) button available in the upper right section, and select the Delete command.
In the prompted confirmation message, click "Yes" to delete the Deliverable.