If you are going to delete roles, you do not choose the trustee in the list View roles assigned to user. But choose the estate in question in the list Bankruptcy estate and click on Update.
Underneath, you choose the alternative Delete roles.
You can choose to delete roles one by one, by clicking Delete delegation to the right, or you can choose to delete several roles simultaneously by ticking the box to the left and choose Delete.
If you are deleting many roles, it might be easier to do this through the function Estate delegation jointly.
Note that the roles of the trustee are not possible to delete directly in Altinn, since the trustee has been given his/her roles through the registration in the Central Coordinating Register for Legal Entities.