Script to Delete Applied Archivelog from Standby ( RAC )

#!/bin/ksh
export ORACLE_SID=ORCL
export ORACLE_HOME=/app/oracle/product/12102/db
export NLS_DATE_FORMAT="DD-MON-RRRR HH24:MI:SS"
export TODAY=`date '+%Y%m%d'`
export TIME=`date '+%H%M%S'`
rm /app/oracle/dba/script/notearc.txt
sqlplus -s "/ as sysdba" << EOF
set pagesize 0
set pages 0 echo off feedback off
spool /app/oracle/dba/script/notearc.txt
select thread#,max(sequence#)-10 from gv\$archived_log where applied ='YES' and REGISTRAR='RFS' group by thread#;
spool off;
exit;
EOF

seq1=`cat /app/oracle/dba/script/notearc.txt | awk 'NR==1{print $2}'`
seq2=`cat /app/oracle/dba/script/notearc.txt | awk 'NR==2{print $2}'`
seq3=`cat /app/oracle/dba/script/notearc.txt | awk 'NR==3{print $2}'`
echo $seq1 $seq2 $seq3
$ORACLE_HOME/bin/rman msglog /app/oracle/dba/logs/STANDBYDBY_ARC_DEL.${TODAY}_${TIME}.log << EOF
connect target /
run{
delete noprompt archivelog until sequence $seq1 thread 1;
delete noprompt archivelog until sequence $seq2 thread 2;
delete noprompt archivelog until sequence $seq3 thread 3;
}
EOF

-------------------------------------crontab------------------------------

05 02 * * * /u01/app/oracle/cleanarc.ksh > /u01/app/oracle/clean_arc.log 2>&1