Warren Buffett’s Berkshire Hathaway has cut its stake in Apple, apparently for tax reasons.The conglomerate’s first quarter earnings report — released Saturday — showed the company’s investment in the tech giant at $135 billion. A report by CNBC noted this would mark a drop of 13%, though Apple remains Berkshire Hathaway’s largest holding, and that this was the second quarter in a row that it has reduced its stake in the company.During a question-and-answer session at Berkshire’s annual meeting in Omaha, Bu ...