COMMODITIES-Oil drops on Fed fears, mine restart pressures copper

* Brent, U.S. crude down 2 pct; biggest slide in a month * Imminent restart of Grasberg mine weighs on copper * Soybeans slip on news of China cancelling order from U.S. * Gold ticks higher as dollar falls, coffee rebounds too By Barani Krishnan NEW YORK, May 29 (Reuters) - Oil prices slid their most in a month on Wednesday, falling with Wall Street stocks on worries the Federal Reserve could phase out its stimulus, while copper came under pressure from the imminent restart