We already knew the current line of Mac Pros would be discontinued in Europe due to new regulatory standards come March 1st, but we didn't think Apple would pull the plug on its tower desktop this early. According to 9to5Mac, several European Apple Online Stores now show its Mac Pros as "currently unavailable" a couple of weeks before the computers are to be sunsetted. We're not sure if this is the case with machines in brick-and-mortar locales, b