Former Clinton White House Mr. Fix-It Bruce Lindsey emerged tight-lipped yesterday after testifying before a federal grand jury probing whether top-secret documents were illegally removed from the National Archives. The grand jury probe, reported exclusively in The Post Tuesday, is digging into why another former Bill Clinton aide, Sandy Berger, sneaked the national security documents out of the Archives — possibly in his socks. Lindsey denied any inside knowledge about Berger's sticky fingers. "All I know is what he [Berger] said. He made a public statement," said Lindsey, Clinton's deputy White House counsel, after testifying under oath yesterday. Berger admits...