How to remove ACL from a directory and back to usual access control?

Question

I accidentally added extended permission using setfacl, so how can i remove it?

I successfully set extended permission with

setfacl -R u:user2:wrx /tmp

and I have tried to remove with instructed by man page

setfacl -R -x u:user2:wrx /tmp

But not success in removing this permission

Answer 1

Here is how:

setfacl -bn foobar

from source:

https://unix.stackexchange.com/questions/339765/how-to-remove-acl-from-a-directory-and-back-to-usual-access-control