@CaioDA Just disable them from the admin control panel. Options > Disable then Save.
Is it really that simple? Now I'm embarrassed... But, going along with what @planner said and @psychobunny pointed out, this is a very developer centered forum software with an initially steep learning curve. It's not quite plug and play. I recommend something like Foundation's Joyride to introduce new users to the system.
Update: But currently, there is no way to remove them completely (unless a forum restart is required or override them). That's a feature I'd love to see.
Glad to report that as of today, April 25th, all instances of our Premium Hosted platform benefit from backups stored via the Tarsnap backup service.
Our previous backup solution consisted of local file system backups of each instance's database contents, persisted to the local file system. This had two shortcomings:
Backups were not hosted off-site (a big no-no! )
Uploaded files in /public/uploads were not backed up
I'm glad to say that both of these shortcomings have now been addressed. Luckily, we have never had to restore a NodeBB instance from back up, thanks to our reliable hosting from DigitalOcean. Hopefully, we'll never have to