how do i uninstall iris shaders

I want to get the mod distant horizons but every time I try to launch minecraft it tells to uninstall iris shaders (I am using lunar client) but when I check my mods folder iris isn`t even there but then I disable distant horizons and launch game i check my in game mods menu and iris shaders are right there I have no clue what to do I have been stuck trying to figure his out for hours with no videos or other people having the same issue

https://preview.redd.it/n35sce2h1lvd1.png?width=489&format=png&auto=webp&s=0c8c3b39ca005a3c5e427fa219cd5ca9cc90463f