January continues unabated with “The Boy,” a horror movie which was not shown to critics before opening day. It’s about a young woman who takes a job as a nanny for an 8-year-old boy at a towering, Gothic estate in the English countryside, only to find out that the boy isn’t really a boy at all, but rather a doll whom the parents treat like an actual boy. Sounds super creepy, right? It’s actually pretty silly. My RogerEbert.com review.