I'm currently playing

• astralsorcery-1.12.2-1.10.24.jar, and
• CraftTweaker2-1.12-4.1.20.574.jar
  (the newest versions as of right now, as far as I'm aware).

The line
mods.astralsorcery.Grindstone.removeRecipe(<bewitchment:salt>);
does not actually remove the Bewitchment Salt from the Grindstone outputs.

(Tested this ingame as well, it's not just JEI acting up.)

I have multiple other lines in the same ZenScript file that are working, and there are no syntax errors in my script.
I have also imported
import mods.astralsorcery.Grindstone;
in one of the first lines.

The recipe removal simply does not work.

Made it work by also removing Mekanism Salt first:
mods.astralsorcery.Grindstone.removeRecipe(<mekanism:salt>);