Three parents on Thursday filed a federal lawsuit challenging a controversial 2023 Florida law that increased scrutiny of school-library books and instructional materials, alleging the process for removing books unconstitutionally discriminates against parents who disagree with “the state’s favored viewpoint.” The law (SB 1069), in part, made the process of objecting to books and instructional materials easier — and came amid legal and political fights in Florida and other states about removing books from school shelves. Plaintiffs in Thursday’s lawsuit are two parents from St. Johns County an…