Pittsburgh’s F.N.B. remains on track to close on its buy of Raleigh’s Yadkin Financial, parent company of Yadkin Bank. That’s according to statements made Thursday by F.N.B. (NYSE: FNB). CEO Vince Delie during the bank’s fourth quarter earnings call. He told analysts the banks were on track to close the deal in the first quarter and that merger-related expenses “track in line with original expectations.” “We have a clear path to achieve the targeted cost savings of 25 percent,”…