By Frank Dalleres Arsenal manager Mikel Arteta has rubbished reports in Spain that he is ready to take the Barcelona job, insisting he has unfinished business in north London. Arteta has been touted for a return to the club where he developed as a youngster after current boss Xavi Hernandez announced at the weekend that he would quit in the summer. He called one Spanish media report that Arteta had told his inner circle he would be leaving Arsenal at the end of the season “totally fake news”. “I don’t know where it’s coming from and it’s totally untrue. I’m really upset about it,” he said. “I’…