Walt Disney Co. said Friday that it would dismiss about 160 of the 800 employees in its feature animation unit as the company slowed production at what once was its crown jewel. The 20% cutback comes nearly a year after Disney purchased Pixar Animation Studios, maker of such computer-animated hits as "Cars" and "The Incredibles." Pixar executives including creative guru John Lasseter took control of the Disney group, aiming to revive an operation that was a crucial profit center before it lost ground to other studios. "With John Lasseter from Pixar being put over the division, and the much brighter...