LOL! California will likely prosecute you for removing that sticker! My go-to sticker-remover is the rubber-cement solvent, Bestine. It won't smell-up the interior like the handier solvent, gasoline, would. It would be ironic to use gasoline to remove an inappropriate ICE-car sticker from your electric car and then have that noxious smell inside your electric car. Still, I'd try to remove the sticker w/o a solvent so there would be less chance of having to clean off residual adhesive after using the solvent. If that failed, I'd use the solvent.
I had that sticker. I just grabbed it slowly and it peeled right off with almost no residue. The tiny bit around the edges of the sticker came off with a simple moist cloth.
I had no issues because I pulled it off within hours of getting my car, so I suspect the sticker was not on for very long. But for stickers which are older and have dried out glue, I use Goof Off. It dissolves pretty much any glue residue; it's what I use to clean up that super-strong dashcam adhesive when I remove the old dashcam mount.
any chemical suited for removing that label will also cause the state of california... er... known to california to cause cancer...
After removal, to dispose of it, I'd drop it in a bucket of used motor oil and pour it down the storm drain.