How To delete a process

Once a process is added (PeopleTools -> Process Scheduler -> Process) then it can be deleted from the following table.
1. PS_PRCSDEFN
2. PS_PRCSDEFNGRP
3. PS_PRCSDEFNPNL
4. PSPRCSRQST
5. PS_PRCSDEFNXFER ( Not required always)
6. PSPNLFIELD ( Not required always)