Resources being consumed by packages that don't exist...?

I’m currently using a droplet with just 2GB of memory and have noticed abnormal resource consumption despite managing only a pair of tiny WordPress installations and one HTML template. I used htop and filtered by memory% and found three culprits:

• sidekiq 6.0.7 discourse
• ruby /var/www/discourse
• unicorn (various processes)

The /var/www/discourse directory doesn’t exist and any attempts to uninstall sidekiq with sudo apt-get remove --auto-remove ruby-sidekiq returns “package is not installed”.

I will say that I tried using Discourse (forum software) on this droplet years ago but have since removed those files. I am concerned that maybe when I created this droplet, I had selected the Discourse image from the Marketplace, but it’s been quite some time since I created the droplet and I can’t remember.

Any advice outside of migrating to a new droplet? I want to be upfront that I’m a hobbyist and self-taught so migrating to a new droplet seems a bit too involved at this point.

Thanks!

EDIT: I do recall that Discourse requires Docker and after confirming it’s installed, I removed Docker entirely using the answer found here: 16.04 - How to completely uninstall docker - Ask Ubuntu

Memory usage went from 1.6GB down to about 1.05GB and I don’t see the sidekiq process running but I’ll continue to monitor because I doubt that it’s was that simple.