...
Click on the Configure Metadata app on the main apps screen. If you want to add, edit, retire/restore or delete metadata in the new UI, this is where you go.
When you click on any of the links in blue above, you should be able to view page that lists the respective metadata, the action column on the right has these icons 
, use the pencil icon to edit, the 'x' icon to retire and the trash icon to delete items forever. When you retire an item, the 'x' icon gets replaced with 'restore' icon which when clicked should un retire the item.
Manage Forms
Under the Configure Metadata screen, there is now a new app to "Manage Forms". This is a new feature in OpenMRS 2.1. It is now possible to add custom forms to the new user interface without any custom programming! When you initially enter Manage Forms, it shows you a list of forms that exist in the system. Obviously, before you can configure where a custom form will appear in the system, you must create the form. Both HTML and XForms are supported, but they must be created through the legacy user interface, under System Administration - Advanced Administration.
...