By Foo Yun Chee BRUSSELS (Reuters) – Amazon’s $1.4 billion acquisition of robot vacuum maker iRobot will be blocked by EU antitrust regulators, three people familiar with the matter said on Friday, as enforcers beef up scrutiny of Big Tech deals. The U.S. online retail giant defied a European Commission’s warning that the deal could restrict competition in the market for robot vacuum cleaners by declining to offer remedies to address such concerns last week. The Commission, which is scheduled to decide on the deal by Feb. 14, and Amazon declined to comment. The regulator’s main concerns were t…