You don't have to remove the LCD screen from the assembly, but you do have to remove the assembly from the MacBook.
You need to heat and slide a thin tool under the silver bezel (painting knife). Be careful doing this along the bottom, as it is easy to cut the screen ribbon, which would mean replacing the screen. Usually, I go around the left right and top sides, the bottom and right corner, then the bottom middle (where it says MacBook Air). I then heat the bottom and pull it off, it doesn't bend this way and ensures the ribbons do not get ripped.
Once this is off, remove the hinge cover and unscrew the hinge screws holding the LCD cable in. Unscrew the screen board, unplug the backlight and LCD cable, then remove the rubber bezel slightly (which goes over the LCD cable) to be able to pull the LCD cable out.
Hope this helps. Google "a1369 lcd replacement" to see visually how to remove the bezel, screen board and generally see what this area looks like. You will not have to remove the LCD to do this.