By Alex West Kevin Costner and Christine Baumgartner have finalized their divorce on February 16. According to documents obtained by The Mirror, the pair have been excused from parenting classes, despite their filing of dissolution of marriage with minors. This comes as Christine’s lawyers filed court documents requesting that they are both excused from completing a mandated co-parenting course. The former couple have previously reached a joint custody agreement for their three children including their 16-year-old son Cayden, 14-year-old son Hayes, and 13-year-old daughter Grace back in Septem…