Actor will be best remembered for Oscar-nominated performance in They Shoot Horses, Don't They? Susannah York, the British actress whose gamine looks and demure persona made her an icon of the swinging 60s, has died at the age of 72. She passed away yesterday following a long battle with bone marrow cancer.York won acclaim for her roles in They Shoot Horses, Don't They? " the 1969 film role for which she was nom…