sudo apt autoremove --purge snapd gnome-software-plugin-snap

rm -fr ~/snap

From: https://askubuntu.com/questions/1035915/how-to-remove-snap-s...

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..Or..

sudo apt purge snapd

rm -vrf ~/snap

# following may not be required as apt purge already removes them

sudo rm -vrf /snap /var/snap /var/lib/snapd /var/cache/snapd /usr/lib/snapd

# trying to install some package like chromium-browser will bring back snapd

# make sure snapd is not installed as a dependency anymore

# downside is that some package installation might fail because of dependecy on snapd

sudo apt-mark hold snapd

From: https://www.kevin-custer.com/blog/disabling-snaps-in-ubuntu-...