NEW YORK—In an effort to further reduce payroll, the Knicks have traded all of their remaining players for cheaper replicas. The replicas are life size models and realistic in nearly every respect. It takes a very trained eye to notice the difference. Avid Knicks fan Spike Lee has been attending games for years and only recently discovered that former Knick Nate Robinson was just an inflatable doll. When asked for details on the deal, Team President Donnie Walsh called it