Instead of removing the warning all together can you make it so you can set a price of items that you would not like the warning to have.
in OSBuddy or some runelite client I Remember being able to remove the warning for items below 50K or whatever value you input.
I'd like to be able to drop all my fish in my inventory without a warning while clicking on an Ely in inventory it will avoid that message for the Ely but drop the rest without asking.