You can manually delete one or more jobs from this list. When you do this, the system launches a purge job based on the class of each run. The process is the same as if an automatic deletion had been triggered by the class properties. The system archives the job (if it is not to be completely deleted) and deletes the data specified for jobs of that class. See Classes.
To delete jobs:
If the class is set to delete output files but retain console data, then deleting the run from the Completed list deletes the output files and moves the job's entry from the Completed list to the Archived list.