Hey, net, do you know the scale of the stuff we're talking about here?
It's considerably cheaper and easier to just pile this kind of stuff (right now it amounts to an old fixed-grip aerial tramway) in a reasonably open area, so that it can be moved and manipulated with forklifts and cranes...and you don't have to worry about whether it will fit through the door... :)
Warehouse space isn't cheap, and there are better uses for that space...items, for instance, which need to be secured, or protected from weather. Old ride parts only need to be secured when there are enthusiasts about :), and they certainly don't need to be protected from the elements...
Also, parking disused stuff inside the park means that it doesn't have to be moved as far should they decide to make use of it at some future time...
--Dave Althoff, Jr.
Who notes that amusement parks typically never throw anything away...