Did you even search for any ways to do it on this site?
There are numerous blogs on doing this; How to completely remove snap - #2 by franksmcb is just one of many.
FYI: If it was me, I'd read up on the consequences which have been written about by developers first; sure the link I provided was written by a Ubuntu MATE developer & it will work; but you do mention upgrades to a new version which the link I provided does not cover; but many of the actual blogs addressing the topic do cover.