Tori Spelling has a theory about why Hilary Swank got fired from Beverly Hills, 90210! Remember that? Hilary got the principal role of Carly Reynolds during the eighth season in 1997. However, she did not stay on the show for long. She got written out after only 16 episodes. Damn. But why? The exact reason is unknown, but Tori has a guess! Related: Tori Spelling Says 'Old Friend' Kim Kardashian's Bodyguard Blocked Her From Saying Hi! During a new episode of the 90210MG podcast on Friday, the 52-year-old actress reminded her co-host Jennie Garth that Hilary was "signed on as a full-time cast me...