EXPORT OLD Programs to DELETE them out of Marketo instance

I would like to EXPORT OLD Programs to CLEAN / DELETE them out of our Marketo instance (to keep things 'tight & right')

It is way too time consuming to UNHOOK everything and delete each asset / program manually.

I have 4+ years of programs to delete -- across 10+ business units.

And we have only three resources to run campaigns and manage the instance.

Another thought is -- after 2 years of archiving -- Marketo automatically deletes assets/programs.