archive log no been deleted by rman
i have set the rman retention policy to recovery window of 15 days.
But i see that i have archive logs all the way back to September 2018.
I did crosschecks:
crosscheck backup of database;
Crosscheck archivelog all;
crosscheck backupset;
but when i do "delete obsolete", it does not list any of the old archive logs.
What do i need to do to remove the old archive logs?