AP: Shares in Electricite de France SA are down after the French state-owned utility’s U.S. partner said it will pull out of a project to build the first of a new generation of nuclear power plants in Maryland. EDF shares slipped 1.3 percent to euro31.22 ($43.31) at midday on the Paris stock exchange — and were the biggest loser on the benchmark CAC-40 index. EDF said the future of the multibillion-dollar Calvert Cliffs 3 plant project is unclear after partner Constellation Energy …