While I’d say it is possible to remove the Ronto and keep other elements, like the shadow under the landspeeder, I don’t think that’s the best way to go about it. The problem with the SE landspeeder shadow is that to do it, they cut off the bottom half of the landspeeder. It just doesn’t look right. It’d be better, in my humble opinion, to roto out the landspeeder entirely and then reinsert it to have more stable movement and a new shadow beneath it that doesn’t rely on cutting off parts of the speeder to begin with.
Biggs in ANH edit idea
ROTJ opening edit idea