The confectionery giant Mars has bowed to pressure to remove a product that dispenses M&M’s in the style of a slot-machine game, after MPs and an academic said it risked normalising gambling for children. The product, on display in the M&M’s World store in London’s Leicester Square, works like a one-armed bandit gambling machine, where users pull on a lever to make three reels spin. If the pictures on the reels match one another the machine, on sale for £33,…