non-free.md: Delete Federated Identity/Authentication section

fixes https://github.com/awesome-selfhosted/awesome-selfhosted/issues/2253

non-free.md

@@ -26,10 +26,6 @@
 
 - [Ubooquity](https://vaemendis.net/ubooquity/)  `⊘ Proprietary` - Ubooquity is a free to use, versatile, lightweight, multi-platform, and secure home server for your comic and e-book library. `Java`
  
-## Federated Identity/Authentication
-
-- [Auth0](https://auth0.com/docs/appliance): `⊘ Proprietary`. Identity made simple for developers. `NodeJS`
-- [FusionAuth](https://fusionauth.io) `⊘ Proprietary` - Authentication and Authorization built for devs with OAuth2 and SAMLv2 support. Free as in beer. `Java`
 
 ## File Sharing and Synchronization