CPP0612021I Job removed from selection list, but is retained in the skeleton data set.
Explanation
You deleted a user-defined job from the dialog's Job Selection List panel. The job is retained in the skeleton data set (SCPPSENU) because you did not request deletion of the job.
To delete a user-defined job, you must specify Y in the Delete Skeleton field when you confirm your deletion request (you cannot delete an IBM®–supplied job).
System programmer response
None, unless you also want to delete the job itself. Here, you must edit the SCPPSENU data set to remove the job.