m0useanswered grow question a year ago I’d say you want to find the reason they are yellowing up and dieing, but this might be end of life fade with some burning from overfeeding. So its not real important as your going to harvest soon.
If they have any green in them, leave em. If they dead pluck em out, they should not have much resistance like a green leaf does. If they still alive and you pluck a lot out, it might add undo stress to the plant and sometimes extra stress can complicate things.
IMO: i’d leave it all alone n do a plucking before chop n dry just to clean it up a bit.
Best Of Luck!