HAVANA — Cuba is to release two prisoners, the archbishopric of Havana said Thursday, though the men are not among 11 high-profile prisoners slated to be freed under a deal between the government and Roman Catholic Church.Under the informal agreement, the government of President Raul Castro is to free 52 peaceful dissidents jailed in 2003.Forty-one have been released so far but 11 are still behind bars, and there has been speculation about whether the government would release them before Christmas.