How can I remove the Damage Flash?

I would like to remove the Damage flash in Minetest. There does not seem to be any setting in the game to remove it.

I am trying to remove the damage flash by removing that code from the files that are contained in the Minetest directory. I was able to use this method to remove the blood particles. The problem is that I am not a coder, and although I have a reasonably good gist of what the code is doing, I cannot find the code that creates the damage flash for every time you take damage.

Could someone help me find this code? If not, do you know of another way to remove the damage flash from the game? Thanks!