Docker command still there after purging Docker

First, before I purged docker, I ran:

dpkg -l | grep -I docker

and it only returned:

python3-Docker

There were no images, containers, volumes or anything else configured.

I followed the instructions in the Stack Overflow thread How to completely uninstall docker to remove Docker.

After all the steps sudo docker stills shows up.

How do I get rid of this without doing a full re-image of the desktop?