Maureen O’Boyle will replace Libby Weaver next month as co-anchor of Warner Bros.’ firstrun magazine strip “Extra.”O’Boyle’s return to “Extra” signals the formal demise of her Warner Bros.-distributed talkshow, “In Person with Maureen O’Boyle” (Daily Variety, June 16). In spite of clearances on strong stations, the freshman strip averaged just a 1.4 national Nielsen household rating in the past season. O’Boyle, the one-time anchor for the tabmag “A Current Affair,” served as senior correspondent and weekend anchor for “Extra” in 1995 prior to the launch of her talkshow last fall. Weaver’s departure comes as “Extra” undergoes a change of executive producers, with Steven Lange succeeding David Friend next week. Sources close to the show say “Extra’s” male co-anchor Brad Goode is likely to stay put.