Slovakia’s main refiner Slovnaft said Tuesday that Croatian pipeline operator JANAF had sharply reduced deliveries of non-Russian crude, threatening Central Europe’s effort to diversify away from Russian supply. The company, part of Hungary’s MOL Group, reported losing approximately 90,000 tonnes of Arab Light crude that had been contracted for October and November, according to Reuters. Slovnaft described the decision as a “breach of contract,” warning it “seriously jeopardizes the supply of non-Russian fuel…