Russian oligarch Alexey Mordashov, the single biggest shareholder in the German travel group Tui, is leaving the firm’s supervisory board in view of the EU sanctions imposed on him. The company made the announcement on Wednesday, saying that “the aim of the EU sanctions is that Mr Mordashov can no longer use his shares in Tui,” and therefore not make any profit from them. “Mr Mordashov is also resigning from the Tui Supervisory Board with immediate effect. He formally declared the resignation of his mandate to the company today,” it said. The sanctions would have no impact on the company itsel…