Nigeria is abandoning plans to impose a 15% duty on imported refined petroleum products, which is a blow to its new private domestic refinery of billionaire Aliko Dangote. “The implementation of the 15 per cent ad-valorem import duty on imported Premium Motor Spirit and Diesel is no longer in view,” the Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA) said on Thursday in a statement advising against “panic buying of any petroleum product.” There is an adequate supply of petroleum products…