That would depend on several factors. How did you install these mods. Did you use a mod manager, did you edit them in by hand, did you just overwrite the original files without a backup or moving the originals to a seperate folder before you replaced them. There is copies of the original ini files here in the download section. If you installed bini qdu it makes backup files of the originals in the bini folder where you installed it. If you did use the mod manager to enable these mods you should be able to disable the mods using the mod manager again.