San Francisco (Reuters) – The U.S. safety regulator said on Wednesday that it is reviewing consumer complaints that Tesla vehicles are activating the brakes unnecessarily, in the latest regulatory scrutiny of Tesla’s vehicle safety. In May, Tesla chief executive Elon Musk said dropping a radar sensor from its partially automated driving system would address the so-called “phantom braking” issue, which some Tesla drivers have long complained about. The Washington Post reported on Wednesday that owner reports of phantom braking to National Highway Traffic Safety Administration (NHTSA) rose to 10…