I would remove them. I'm not an expert by any means but I do know on most plants if they have dead leaves on them they should be removed. Reason being the plant will continue to try to push water and nutes to them, and by doing this it takes that water or those nutes from the rest of the plant. I know that on any plant that I grow garden, house, & mj any of them have dead leaves I remove them. Now with that being said if the whole leaf is not dead you can learn things from it such as, nute deficiancies, temp problems, Ph issues, & things of that sort. Good luck hope this was helpful and happy growing!!