A 43-year-old man pleaded guilty Wednesday to a hit-and-run collision on a motorcycle that killed a pedestrian in San Clemente. Adam Jerhemie Horner was riding a motorcycle that struck 61-year-old Susan Fernandez of San Clemente about 9:50 p.m. April 14, 2021, near El Camino Real and Boca De La Playa, according to Carrie Braun of the Orange County Sheriff’s Department. Fernandez was pronounced dead at the scene, she said. Witnesses gave deputies…