I'm Just Not Hearing It..., Do You???

Don't need super high resolving system to hear it. Now I suppose they could remove it during remastering, I don't know why they would but its possible some remaster out there has eliminated it.

I can hear it on the remaster , Qobuz. 
 

almost sounds like it could be something intentional if you didn’t know what it was, like a Mark Tree, or, I hear a Mark Tree and no squeak?

This seems similar to listening for that creek of the piano stool Ringo was sitting on when they played that final note of "A day in the life". No, it's not necessary to enjoying the music, but it is a fun little Easter egg.

You definitely don’t need any fancy equipment to hear it. I can hear it loud and clear on my phone using Qobuz.

I have the original CD and listened on the AKG headphones and still don’t hear it.  

I also had my wife’s healthcare worker listen on YT to Remastered version, nearfield, and she couldn’t hear it as a squeak.  She is really big into jazz.  We certainly heard other low level noises.

Maybe people are describing it differently, or maybe this is like the Emperor’s New Clothes...

Maybe it was one of the other tracks I remember hearing it on as a kid.  There are several that are of a similar "groove."  Maybe I’m going to have to listen to the early catalog on headphones to see if I can pick it out.