Ruby/Rails - Remove ActiveAdmin from my application

I had a good time playing with Active Admin the administrative framework within my application.http://activeadmin.info/

When I installed it I ran

rails g active_admin:installrake db:migraterails g active_admin:resource product

and it generated alot of migrations and code within my application.

My question if I would like to go back and have everything that active_admin put into my application taken out, how would i do so?

Is there one 'rails active_admin:uninstall' command to get rid of everything or do I have to manually create migrations to delete all the tables and search through my code to see what it added?