At some point, you may decide to remove a role that you no longer need. Removing a role in the past was error prone because you couldn't be sure you had removed all the component parts. Windows Server 2008 improves on this process through the Remove Roles Wizard.
You still have access to the Add or Remove Programs applet, as you did in the past, in Windows Server 2008. However, Microsoft has changed the name of this feature to Programs and Features. It's still possible to add or remove roles using this approach. Server Manager provides another option that you might want to try, however: Adding and removing roles can now rely on a wizard that helps you create a complete role rather than install a particular piece of software and find that you didn't install enough.