Revert "Generated ActiveAdmin files"

This reverts commit ae0c725967406dcfce4b6d67df98c7bc9a369857.
Revert "Got rid of files"

This reverts commit 545441417e3dbcd99c10c68fc9bcda135797d54c.
Revert "Added admin interface"

This reverts commit eba8ca463d2aae749797afbb783ebcb5c5a54b14.