How to remove deault (Active Directory) claims provider from ADFS

Hi,

I have configured ADFS as a resource provider that protects Sharepoint 2010.

All users are authenticated against 3rd party identity providers, but when they access Sharepoint by URL, they see a realm discovery page with a drop-down list containing all IdPs plus IdP with a name of ADFS server.

I want to hide that AD IdP to that users won't be able to chose it. The users must be able to select only 3rd party IdPs. Is there any ADFS config parameter that allows achieving this?