Yes, finings are for *aesthetic purposes, to make the wine less cloudy. If it's clear, don't use it.
If it's had an airlock on it for all those months, it will have degassed itself, as the pressure will have reached an equilibrium with the atmosphere around it. If for some reason you completely sealed it with lids, screwtops, bungs etc., it might be a bit gassy, but I assume you didn't do this. If you did and it is fizzy and you dislike this fizz, I can't help you. If you like it fizzy, I'm happy for you and I hope you enjoy it. I presume it's not fizzy though, and if it isn't no degassing is required.
I think that's what degassing is all about.