Oracle Job Scheduler for Remove export files / OS files

select * from dba_directories;

exec utl_file.fremove('MYDIRECTORY', 'test.txt');

EXEC UTL_FILE.FREMOVE ('EXPORT_AUTO','exp1213'||'_'||TO_CHAR(SYSDATE-2,'DDMMYYYY')||'.DMP');

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BEGIN
  DBMS_SCHEDULER.create_job (
    job_name        => 'REMOVEexp',
    job_type        => 'PLSQL_BLOCK',
    job_action      => 'BEGIN UTL_FILE.FREMOVE (''EXPORT_AUTO'',''exp1213''||''_''||TO_CHAR(SYSDATE-2,''DDMMYYYY'')||''.DMP''); END;',
    start_date      => '01-APR-12 01.00.00 PM ASIA/CALCUTTA',
    repeat_interval => 'freq=DAILY',
    end_date        => NULL,
    enabled         => TRUE,
    comments        => 'JOB to remove old dump file');
END;
/

exec dbms_scheduler.run_job('removeexp');