In order to automate all manual steps, Job object is usually used but objects that are created by the Job are not deleted by deleting kfdef. 

For example, an automation script creates a CR, and the CR is not deleted when the kfdef is deleted. It is because CR is not deleted when an operator is uninstalled. Moreover, there are no kustomezie manifests for the CR. 

In conclusion, the CR is never cleaned up. The same goes for other objects.