We all have different ideas I would not remove any leaves from my tomato plants as they are there to work for the plant . If you remove too many you can expose the fruits to too much sunlight and get hard areas form. All my leaves remain all the time they are working for the plant, when I show slides of my tomatoes I am often asked why do I not remove the lower ones, I just reply I cannot see any reason to do so. We all have our own ways.