I’ve had the whole front suspension in bits on my Zoe, the procedure to remove the anti roll bar bushings is as follows:
There is an under tray at the front that covers the anti roll bar bushings which needs to be removed, the Torx screws that hold this on are likely to be VERY rusty, if you are going to remove it I would purchase replacements from Renault first so you can button it all back up properly.
I had to remove studs from the plastic fittings because the heads sheared straight off several of them when I removed an under tray.
These are available as a kit from Renault but they are also eye-wateringly expensive.
I paid the dealer tax because it was a lot less grief than trying to source them elsewhere, not to mention the huge savings made by undertaking such work more than offset cost items like that.
Lifting both front wheels off the ground gets rid of all the tension in the anti roll bar, there is a bolt either end of the anti roll bar that connects it to the drop links.
(I personally would replace the drop links while your at it because they are like £18 for the pair and they are notorious for failing in the Zoe)
The anti roll bar bushings are retained by a metal bracket that hooks into the bottom of the sub frame on one end then has a single bolt on the other as I recall, once you have removed these 2 you should be able to replace the bushings in situ.
That’s about all there is to it, just out of interest why do you need to remove your anti roll bar?
It sits on top of the sub frame, seems a lot of work for little gain.