Amazon has dropped its planned $1.4bn (£1.1bn) acquisition of the Roomba maker iRobot, amid EU opposition to the deal.The e-commerce company will pay a $94m break fee to iRobot, which immediately announced plans to axe 31% of its workforce – or 350 employees – and the departure of its chief executive.The Wall Street Journal had reported on 18 January that the EU’s executive arm was preparing to block the deal and had informed Amazon of its proposed view.Amazon and iRobot said in a joint statemen...