fix remove snap

Author: avafinger

README.md

@@ -601,7 +601,7 @@ BUG fix: https://github.com/avafinger/nanopi-r2s-ubuntu-server-minimal-image/rel
 * Remove unwanted servicesrunning on background
 
 		sudo apt-get remove whoopsie
-		sudo apt-get remove snap
+		sudo apt autoremove --purge snapd
 		sudo systemctl stop apt-daily.service
 		sudo systemctl stop apt-daily-upgrade.service
 		sudo systemctl mask apt-daily.service apt-daily-upgrade.service