Thats personal preference, but you should at least take of the burnt parts of the leaves. I would take the whole leaf off at the stem, so that the plant is not wasting energy tryin to repair it. But without a pic its hard to tell ya. If you dont have many leaves (young plant) then i would try to save the ones i could. If your in veg and you sill have a little time then you could just top it. This would do a few things for you like get you away from the light(for a few days anyway lol), get rid of the uglyness, and possible increase your yield.