I dont know if is just me, but i found out a way to remove it. Not always work, but suddenly, after long time trying, you can remove it. Go choose a picture for your wallpaper, then when you are adjusing the wallpaper, go and slide it down, slide it a few times, and the black tint will go away, but if you touch the wallpaper again, then it will appear again. If the black tint just go away for a second then appear again, then, go pit from the app or settings, and go back in again, and try it. It work for me and i found this glitch. Hope this will help