Well, after a week at work I am not eager to spend even more time looking at the code. But just by the look of the things my whole map was stored there. I deleted "map" with all the sessions, but still was able to see assembled map of my journeys. And it has to be stored client side, so it has to take the space.
But it's not the space that bothers me but the fact that it's old world information (you never know how it will affect the new data). I am sure I'll clean it before starting playing in the new world and thought maybe it's worth to point out.

Too old to rock-n-roll, too young to die.