Get the bare Learner without the CPOs that were previously added.
It is still possible for the result to be a wrapped learner, e.g. a TuningWrapper wrapped learner. It is also possible that below the tuning wrapper, there are more CPOs. These can and will not be removed.
This function is complementary to getLearnerCPO.
getLearnerBare(learner)[Learner]. The learner without attached CPOs.
[Learner]
The learner to strip.
Other CPOLearner related:
CPOLearner,
attachCPO(),
getLearnerCPO()