Removal of unused database to free up space.

I am trying to free up some space in the server by detaching the unused database and deleting the ldf & mdf files. Here are the steps I took
1. Performed a full back up of the database
2. Moved the BAK file to a different location in another server
3. Ran the follwing on the database since it was a publisher in the replication
sp_replicationdboption 'dbcentral,'publish','false'
4.Detach the database
5. Restore the db from the bakupfile somewhere to make sure that the back up is good.
6. Delete the files since I have a full back up.