getting rid of every trace of docker from fedora 29 for re-install?

[Robert P. J. Day]

as part of an intro tutorial i'm writing, i want to provide a recipe
for installing docker-ce on fedora 29 from absolute scratch, and part
of that will involve how to first get rid of every trace of any old
docker- or container-related stuff.

if one has no interest in preserving old containers, i'm proposing
running (as sudo, naturally):

$ dnf remove "*docker*"
  $ rm -rf /var/lib/{containerd,docker,docker-engine}

i'm fairly sure that's overkill, but the point is to simulate truly
starting from scratch. the above *seems* to work, is there any reason
it would cause problems before i kick in with installing the proper
yum repo file and running:

$ dnf install docker-ce

thoughts?

rday