Was it one of the Jester's Court doors leading to the Dark Forest? I believe that the lower door was sealed off by the time the Jester's Court was introduced. But I don't think the door was really removed though. I think they put a box there to cover it up. Because it looks like you can see the door a little bit in the Season 2 version of the JC. 
Yes, you got it! Funny because we are talking about the Golden Doors, two doors topic on the other thread!
I read somewhere that the actuators were taken off in Medusa's Lair, but considering they didn't take them off in the Jester's Court or the King's Storeroom, I doubt that was true.
Off topic, but I wish they kept the head-cam that they used on the Temple Guards in Medusa's Lair. That was really interesting to see, it was a different view of the temple, and we got to see the kids expressions more. I don't know why they only used the head-cam in Season 2 captures in the "Center of the Room" (yes, I said that...).
Wouldn't it have been fun to see that in Season 3, when the curtain went up in the Chamber of the Sacred Markers?