Can't delete azure database

Databases with the name format system-SOME GUID may be federations.

Deletion (Dropping) of a federation must be done within the database Management Portal for the main database.

Caution: I don't know the ramifications of dropping a federation, so make sure you have backups of data you don't want to loose or research this further.

1. From https://manage.windowsazure.com/#Workspaces/SqlAzureExtension/Databases
2. Select the main database
3. Select "Design your SQL database"
4. Log on
5. At the top you see "server > [DB] > Tables", Click [DB]
6. Federations are shown on this page and you can select them and "Drop Federation"