Fully removing RTx::AssetTracker

Hello All,

I want to fully expunge any RTx::AssetTracker data from my RT
installation in preparation for the RT Assets extension. This data’s
junk/outdated so I plan to start from scratch. I’ve dropped all the
tables/sequences that it creates however there are still things like
CustomFields floating around that I’d like get rid of. I know I can
disable those fields but I’d rather shred them so they’re fully gone.
How can I remove these instead of simply disabling them?