EMILIO PARODI and STEPHEN JEWKES A Milan court acquitted energy company Eni, its chief executive and Royal Dutch Shell yesterday in the oil industry's biggest corruption case revolving around the $1.3 billion acquisition of a Nigerian oilfield a decade ago. The verdict, read out in court by judge Marco Tremolada, came more than three years after the trial first began and after 74 hearings. Tremolada said the companies and defendants had been acquitted as there was no case to answer. The Nigerian government said it was surprised and disappointed by the verdict and would consider whether to appeal once its…