Oil prices continued to slide Friday on fears that coordinated production cuts won’t be enough to eliminate a glut of oil that has weighed on the market. U.S. crude futures fell 79 cents, or 1.6%, to $48.49 a barrel on the New York Mercantile Exchange, their lowest level since before the Organization of the Petroleum Exporting Countries struck a deal to cut production. Brent, the global benchmark, fell 82 cents, or 1.6%, to $51.37 a…