1 DELETE_BOXID
 Subroutine to delete all occurrences of specified box in the specified 
 PSRdb. 
2 Inputs
  1  .long boxid
  3  .long sys_pid of db to delete in.
2 Outputs
  All occurences of boxid in the specified PSRDB are deleted.
2 Returns
  SS$_NORMAL	- OK
