The Toronto International Film Festival is taking a bold step to reduce its lineup of films by 20% for the 2017 edition, in what is likely to be welcome news to some attendees who have lamented in recent years the bulging selections and sidebars. TIFF also says it is retiring the Vanguard and City to City sections. "As we build on the success of the Festival’s past four decades, we’re challenged to balance providing a generous choice of movies for over 400,000…