By Simon Mullock Pep Guardiola has insisted is not Superman. With arch-enemyJurgen Klopp hoping to inflict one last lethal dose of Anfield kryptonite on Manchester City manager, the five-time title winner is happy to admit that he’s only human after all. Klopp will depart Liverpool at the end of the season after locking horns with Guardiola in a battle for supremacy usually found in superhero comic books. Guardiola understands his decision. But even after eight years spent winning trophies and defending his club from the kind of cheap shot delivered during the week by Reds’ defender Trent Alex…