How to delete a registered concurrent program

The concurrent program can be deleted from the back-end.
From front end we cannot delete the program, we can only enable or disable the program.

begin
FND_PROGRAM.delete_executable(executable_short_name=>xxexe, application =>XX_Custom);
commit;
end;
/


begin
FND_PROGRAM.delete_program(program_short_name=>XXCONC, application =>XX_custom);
commit;
end;
/