if a mowing does get done again, it will be one high mph, quick pass, to deal with some leaves, and chop the grass down a little bit. then deck comes off, blades sharpened, everything cleaned out and greased up.
the tractor may end up getting used in winter. to help get around the farm in mud. when vehicles would be stuck 2 tires into the mud, the tractor will keep on going. so having deck off lets me go through so deeper mud, or snow banks if need be.
if you are done with the mower for good, pull the battery and bring it inside. granted most folks leave the battery on the mower... but if ya not going to run it for winter snow clean up... and freezing cold temps. bring the battery inside, get another couple years out of battery.