DAN Rather could be gone from CBS News by the end of the year. After months of negotiations, the former anchor - now a "60 Minutes" correspondent - has not been able to make a deal to remain with CBS - and is reportedly bothered that the network where he worked for the last 44 years does not seem to want him anymore. Rather, whose contract expires at the end of this year, had hoped to finish his career as a full-time correspondent at "60 Minutes." "But it doesn't seem like [CBS] wants him there" now, says an industry insider.