Just because it says "custom", does not mean it is using a graphics setting mod. If you deleted the realifesis mod, then it isn't using it. It usually says custom when it cannot apply what you selected, and it does a sort of "down the middle" kind of road so the game doesn't crash or glitch.
Usually the easiest way to fix this is to exit any game you are currently playing so that the graphic settings you selected can apply easier without threat of a crash causing it to go "custom". If you have a modern day LCD/OLED monitor, disabling Vsinc could also help.