I have already written about How To Delete Work Items in TFS in this post I like to show how you delete Work Item Types you don’t need so you will not get a long list of Work Item Types when creating new Work Items.
Here is how to do it:
Step 1: Download and Install the Team Explorer 2008 - October Power Tools.
Step 2: Log-in to the TFS using a TFS administrator user.
Step 3: Open a command line and go to: “X:\Program Files\Microsoft Team Foundation Server 2008 Power Tools”
Step 4: Use the “TFPT.EXE destroywitd” command in the following way:
tfpt.exe destroywitd /server:[ServerName] /project:[Project Name] /workitemtype:[WI Type]
Important to know that all the Work Items created using this Work Item Type will be lost too.
You can disable the prompt message by using /noprompt.
Have Fun!!!