Removes a Controller from the list of registered Controllers.
NuGet Package: DevExpress.ExpressApp.ConditionalAppearance
A Controller implementing the ISupportRefreshItemsAppearance interface.
When the Controller you registered in the Appearance Controller is deactivated, remove it from the list of registered Controllers using the UnRegisterController method. Pass this Controller as the controller parameter.
To determine when you need to register a Controller, refer to the AppearanceController.RegisterController method description.