PimcoreWorkflowDesignerBundle no longer implements PimcoreBundleAdminClassicInterface and no longer uses BundleAdminClassicTrait. The methods getJsPaths() and getCssPaths() returning ExtJS assets have been removed.
PimcoreAdminBundle is no longer added as a dependent bundle.
The following legacy ExtJS JS/CSS assets have been removed:
Removed Controller\AdminController: the ExtJS-based admin controller providing list, get, create, delete, save,
userSearch and roleSearch actions is no longer available.
Removed Controller\ConfigController: the ExtJS-based config export/import controller is no longer available.
Config import/export is now handled via Pimcore Studio.
Removed Routing\StudioRouteLoader: Studio routes are now registered via standard Symfony configuration.
UserRoleSearchService: Removed is_array() guard around $list->getUsers() and $list->getRoles(): the list
methods are now assumed to always return an iterable. Implementations relying on these lists returning null will
need to be updated.