Mercedes are separating from two of their partners before Lewis Hamilton joins Ferrari, according to a report. Hamilton informed Mercedes in the winter that this would be his final year with the team as he prepares to jump ship to the Scuderia. And now Nextgen-Auto claim that a couple of associated brand deals are coming to an end too. Hamilton is the most successful driver F1 has ever seen, with seven titles, 103 race wins and 104 pole positions to his name. He won six of those at Mercedes after joining from McLaren ahead of the 2013 season. READ MORE: Mercedes driver Lewis Hamilton’s life ou…