Disable swap on Raspbian Buster

Most of the articles I found in searching for how to do this instructed running these commands at the solution to disabling swap on Raspbian Buster:-

$ dphys-swapfile swapoff
$ dphys-swapfile uninstall
$ update-rc.d dphys-swapfile remove

However, after a reboot, swap was re-activated.

After a bit more poking around, I got to permanently disable swap with the following:-

$ dphys-swapfile swapoff
$ dphys-swapfile uninstall
$ update-rc.d dphys-swapfile remove
$ rm -f /etc/init.d/dphys-swapfile

$ service dphys-swapfile stop
$ systemctl disable dphys-swapfile.service

I'm still confused about services that have entries both for systemd and init.d. So if you have some insights into this, please let me know.