Depends how they grow during the stretch , I would advise to wait and see then lollipop or if your 100% sure they wont get light then I would just go ahead and remove them this way your plant can focus the energy into the other tops creating nicer fuller flowers for you ! If say you didn't wanna cut the tops off you could LST and expose them to more light in order for them to grow and become even with the main canopy . You have lots of options here , you could even make clones outta the tops that you dont find viable this way on your next grow you will already be that much more ahead of the game ! I hope this information helps you understand the options you have in dealing with an un even canopy in order to get maximum yield ! -Happy Growing!