Don't do it!
By removing healthy leaves you just reduce the plants ability to produce energy, thereby slowing growth and potentially leading to smaller growth. Your plant needs every leaf it has to make the energy it needs to grow her biggest and best flowers. The lower flowers will grow just fine, their smaller size is not entirely being caused by being shaded, but also by being further away from the light, therefore receiving less intense light. It is best to lollipop your plant just before flowering, and this will prevent the large amount of smaller and lower flowers from ever growing. At this stage I would suggest you just let her finish flowering as is, any metabolic interference that defoliation would produce, at this age of flowering, should be avoided at all costs.
Hope this helps,...........
Organoman.