I've removed:
Front and rear electric window motors, and all internal door wiring (bar drivers door as i wanted to be able to open the window in case of toll booths or similar...)
Central locking pump, wiring and pipework
head lining, A, B and C pillar trim covers
rear seats, belts and retaining brackets
rear boot carpet, side trims, lid trim, and plastics
main carpet
all aircon gubbins
stereo and associated wiring and speakers
rear section of centre console can go, front bit i'll probably leave as it houses the heater controls and suchlike and thus is handy...
Probably more stuff i've forgotten about too.
You need to keep the door cards, as the door seals act on the cards not the door frame itself, but you can gut as much weight out of them as possible and refit the bare carcase
I've left the dashboard itself fitted, as it just looks really **** without it, i've not decided if i'll refit the glovebox or the drivers knee bolster yet.