So, I see the recent major bug with sudo, and on centos (unlike ubuntu
flavors)  I never use it.

Is there a problem with just commenting out the

root ALL = ALL(ALL)    in the sudoers file?

I don't think su is in any way connected to sudoers, but I want to check
before I do something stupid.

I have done some  searching and I can't get an answer about this so far.

Phil Waclawski