By Tzvi Machlin Charles Barkley’s beloved Auburn Tigers are about to play the Miami Hurricanes with a spot in the Sweet 16 on the line. And Barkley has made a bold promise if his team wins. Ahead of the game, Barkley pledged to take his shirt off if Auburn wins the game against Miami. He said he was going to do his impression of Houston Cougars head coach Kelvin Sampson, who took his own shirt off after they punched their ticket to the Sweet 16 over Illinois earlier today. “I’m gonna be Kelvin Sampson tonight. If Auburn wins, I might consider taking my shirt off,” Barkley declared. Kenny Smith…