A Pixar veteran is leaving the animation powerhouse. Lee Unkrich, who first arrived at Pixar Animation Studios as they were making what would turn out to be a game-changing film called Toy Story, informed employees at Pixar on Friday that he would be leaving the studio after 25 years. Per THR, here’s what Unkrich had to say about his decision: "I'm not leaving to make films at another studio; instead, I look forward to spending much-needed time with my family and pursuing interests that have long been back-burnered.” The 51-year-old filmmaker served as …