From the Content dashboard, you can delete any one of your items. Click on the grey hamburger icon to the far right hand side of the item you wish to delete.

From here, click the "Delete" red garbage can icon within the drop down menu. This deletes the item from the Content and workspace.

From the hamburger icon, you can also:

╰Edit a item

╰View a item

╰View who submitted deliverables within a item

╰Duplicate a item