Revert "[NX-606] Unregister features when controller is unloaded"

This reverts commit 260e36d992c431f931aa62d7cbf81235f75553cc.
[NX-606] Send "destroy" event when controller is unloaded / destroyed
[NX-606] Add owner param to watch for destroy events to automatically unregister features
[NX-606] Send controller as param while registering features to automatically unregister them on destroy