Clippers coach and general manager Doc Rivers removed one potential obstacle to his team trading for Carmelo Anthony, saying he would deal his son, Austin Rivers, if he had to. Rivers likely would be the centerpiece of an Anthony trade. Knicks president Phil Jackson, GM Steve Mills and coach Jeff Hornacek met with Austin Rivers, 24, in Orlando during the summer league last July when he was a free agent. The Knicks were outbid for the combo guard and they instead settled on Courtney Lee. According to an ESPN report, to make it happen, the Clippers and Knicks would need a third team to take Jamal Crawford’s long-term contract and Anthony would have to waive his no-trade deal. The Knicks are looking to get younger by rebuilding and Crawford is 36 with a new four-year pact. J.J. Redick, 32, is another player with a sizeable contract whom Jackson likes. Anthony, who was denied a bid to the All-Star Game when reserves were announced Thursday, said before the Knicks’ 110-107 victory over the Hornets on Friday he still hadn’t heard a peep from Jackson and Mills since a meeting last week.