I did this last sept.
Took it all off in situ... albeit while I changed my box...
Take off everything as already said and then either get some pipes up to bipass the old shitty ABS or make all new lines. Remember you're throwing it away it has no resale value so just be brutal.
The connectors into the ABS are a complete pain in the ASS though so new lines might be easier.
You also need to trace the lines and decide if you want a Diagonal split like XR3i or if you want front/rear split which will be better but if you remove the rear compensators you will need a bias valve to safely carry passengers in the back.
A couple of bolts where the ABS bleeds into the fluid resoirvoir and jubilee cliped up is a good and cheap solution and as long as they dont leak passes MOT. NICE ONE!
Make sure your pipes are secure though as loose copper pipes is a failure.
And the light will need sorting on the dash. Just bridge the sensor in the engine bay and wrap it up and hide it.
Job done, better brake performance now all you need is some castrol SRF and nice discs and away you go.
Shings