No one would have gone through episodes after broadcast and eliminated that announcement... I'm not even sure it would have been possible. Anyway, no one would have had any reason to bother.
Perhaps it's best to establish here what a kinescope is. I think a kinescope consists of someone simply pointing a camera at a television or TV monitor, and recording. Therefore, anything broadcast is what is on the kinescope. Someone correct me if I'm wrong.
IMHO, the announcer was a local New York guy who announced upcoming programming or what not.
Tell that to Jim Pierson. He's made all sorts of changes to the eps through the years - not all of them incidental or at all necessary in many fans' opinions...