By Scott DiSavino NEW YORK (Reuters) -Oil slid more than 2% on Tuesday from recent seven-year highs as the resumption of indirect talks between the United States and Iran could revive an international nuclear agreement and allow more oil exports from the OPEC producer. A deal could return more than 1 million barrels per day (bpd) of Iranian oil to the market, boosting global supply by about 1%. The nuclear talks resumed in Vienna on Tuesday. Brent futures fell $1.91, or 2.1%, to settle at $90.78 a barrel, while U.S. West Texas Intermediate (WTI) crude fell $1.96, or 2.1%, to settle at $89.36. …