Seems these are part of the default snapd installation.
Code:
core18 20201210 1944 latest/stable canonical✓ base
gnome-3-34-1804 0+git.3556cb3 66 latest/stable/… canonical✓ -
gtk-common-themes 0.1-50-gf7627e4 1514 latest/stable/… canonical✓ -
snap-store 3.38.0-59-g494f078 518 latest/stable/… canonical✓ -
snapd 2.48.2 10707 latest/stable canonical✓ snapd
Seems like snap forgot to remove the filesystem used for chromium, you can probably either unmount it yourself or reboot the system. Try this:
Code:
sudo umount /snap/chromium/1424
Then reboot boot, if it appears again it means you didn't uninstall the snap correctly.