The classified documents case judge may be on Special Counsel Jack Smith’s last nerve. In fact, John Dean, who served as White House Counsel for U.S. President Richard Nixon, is convinced that if U.S. District Court Judge Aileen Cannon is reversed again, she may be given her walking papers. “I think that’s a real possibility that they think that there is still outstanding possibility she could be removed from this case,” he said during an appearance on CNN’s “Anderson 360.” “There are some motions in front of her that they’re going to be dealt with tomorrow and if if she rules the wrong way, J…