Use this option for occasional housekeeping of machine learning models. Clear models that are obsolete and you do not need them anymore. After you delete a model in the Analytics Center portal, you can still restore the rule instances in Designer Studio that also retrieves the associated machine learning projects. When you clear deleted models, you remove all the data that was associated with the deleted models and you cannot restore the models.
In the Analytics Center portal, click Actions > Clear deleted models.
In the Clear deleted models dialog box, select models that you want to delete.
Click Delete.