Some risk, depending upon how your system was built. But you can mitigate that risk.
Advice: Do not remove the gir1.2-snapd-1
deb package for three reasons:
1) Leaving it shouldn't do anything harmful. Without snapd installed, this package might generate a few application errors since the introspected functions don't actually exist without snapd installed. If this bothers you, then go right ahead and delete the gir1.2-snapd-1
deb package.
2) Removing the depending packages will degrade your ability to control the package manager using desktop features:
gnome-software
software-properties-gtk
ubuntu-release-upgrader-gtk
update-manager
update-notifier
Of course, if you don't use any of those features then go right ahead and delete the gir1.2-snapd-1
deb package. It's your system.
3) Removing the depending ubuntu-mate-core
and ubuntu-mate-desktop
may make other desktop packages eligble for autoremoval.
This is the part that might trash your system. Read your apt output carefully before agreeing to any future removals or autoremovals. This is mostly a risk for folks who build their system up from a minimal .iso or install the desktop environment using apt. If your desktop does vanish, simply apt install those metapackages again.
Folks who installed the desktop directly using a Desktop install .iso are NOT at risk; the desktop packages are individually apt-marked to prevent precisely this kind of mistake. Go right ahead and delete the gir1.2-snapd-1
deb package.