 uninstalling an unused theme goal uninstall a theme that was previously installed but is no longer being used on the site steps in the manage administrative menu navigate to appearance  locate the theme that you want to uninstall in the installed themes section click the uninstall link to uninstall the theme if there is not an uninstall link the theme cannot be uninstalled because it is either being used as the site default theme being used as the administration theme  or is the base theme for another installed theme  