There is no such command that is provided with the system. It is possible to write such a command if you need one. However, two alternatives make it possibly pointless.
First, V5R4 has a new command — Delete Expired Spooled files (DLTEXPSPLF). By setting an expiration date for the QPJOBLOG print file, you can delete all QPJOBLOG spooled files that have reached their expiration date. This command deletes <b>all</b> expired spooled files, so other printer files might also be deleted.
Second, system cleanup can delete system spooled files on an expiration schedule that you set up. Use GO CLEANUP to see how to set up cleanup options and to start the automatic cleanup. This feature has been available for releases going quite a ways back.