I am using sp 2010. I see for one employee 2 user accounts in the people picker. Only the domain name is difference between these 2 user accounts. We have removed all the users from domainA. All the users from domainB are still available. We did a full AD Sync. You still see 2 user accounts in the people picker. When I go to the userprofile service application and search to the username I see only 1 results. It is the useraccount of domainB. 

How can I remove these users from domainA from the people picker?

**UPDATE**

When I go to this url inside some website "<http://myCompany.com/_catalogs/users/simple.aspx>" I see a hidden list with useraccounts. When I remove here users, they are not visible in the people picker from this website. But how to remove users from this hidden list from the whole web application?