TFS: what to do when someone in company leaves or their PC dies?

The title is self-explaning :)

cd C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE
tf workspace /delete workspace;mydomain\myuser /s:http://server:port/tfs_instance_name
 

A deleted workspace cannot be recovered.
Workspace 'workspace;mydomain\myuser' on server 'http://server:port/tfs_instance_name' has 32 pending change(s).
Are you sure you want to delete the workspace? (Yes/No) y

Typically the workspace has the same name as your machine.

Note: this is basically a repost from my previous blog.