FAQ #5: How do I destroy work items or work item types?

In order to destroy work items or work item types, you'll need TFS 2008 and you'll need the TFS 2008 Power Tools.

There are two commands:

DestroyWI: You can use this to destroy one or more work items.

DestroyWITD: You can use this to destroy an entire work item type -- this means, you are destroying every work item of that type and the type itself.

Please note: Destroy means that you are permanently removing all trace of this work item/work item type from the operational store.  The work item data will still remain in the reporting warehouse.