Starbucks Corp. is mandating that Chief Executive Officer Brian Niccol use the company’s private jet for all his travel, including personal trips, while removing a previous restriction that would have required him to reimburse some travel expenses. Under the travel agreement, which was altered following a security review, Niccol no longer has to pay Starbucks back for non-professional use of the jet, according to a filing. Previously, he was responsible for charges from personal travel after an annual cap ...