A couple details of the winter-spring legit lineup in New York have been ironed out, with Holly Hunter exiting the Off Broadway play “The Vandal” and the Bobby Canavale toplined revival of “The Big Knife” setting an April opening date on Broadway.Off Broadway vet Deirdre O’Connell fills the vacancy left by Hunter, who was to have starred in the Flea Theater’s world preem of Hamish Linklater’s play “Vandals,” about a woman and a boy who meet at a bus stop. Reps for the Flea attribute the casting switchup for the Jim Simpson-helmed show — which begins previews Jan. 18 and opens Jan. 31 — to conflicts with Hunter’s schedule. Meanwhile, noir tale “Knife” has locked in an April 16 opening at the American Airlines Theater. Part of the Roundabout Theater Company’s current season, the show, starts previews March 22 and is penned by Clifford Odets, who’s having something of a Broadway moment now that Lincoln Center Theater’s current revival of the scribe’s “Golden Boy” has earned glowing reviews. Doug Hughes directs “Big Knife,” with further casting still to be set.