Swipe up on the wallpaper you wish to delete to reveal the Delete icon (trash can). Tap the Delete icon and select Delete This Wallpaper. Credit: Screenshot by Saikat Basu -- No attribution ...

so it belongs in the trash. The same goes for extra wallpaper still on the roll, if it’s the pre-pasted kind. If, however, you’re left with perfectly plain wall paper on the roll, you can ...