Shock won't jump out or explode when you take it off... it may be a little snug to slide off the mount... (if it is, just give a little pull upward on the back end of the bike)...
If you only pull one,.. there is no danger the rear of the bike collapsing either...
...but,... you don't really need to remove it, to remove the belt guard...
(That mounting tab, under the shock mount, is a slotted one, not an enclosed hole,.. just loosen the shock bolt, and you can pull the guard out from there)...
Once the front, and middle attachment points are also removed,.. just wiggle and jiggle that thing out from the rear...
Pulling the one shock will make that part easier...
...
Leave the tire on... (the bike looks funny without it)...