pruning tomato plants?

I have been studying my first ever tomato plants which I have grown from seed and are now bearing fruits.
I nipped out the shoots that have grown at the angle between the branches and the stalks.
I am watching where the flowers are coming from and have left those well alone but I have some longer than the rest horizontal branches that have nothing but leaves on them. Looking at the rest of the plants where the flowers have appeared so far they have done so nearer the stem end of the branches so my question is;
Do I leave these empy leafy branches alone or are they using up goodness and need to be chopped off?

 

Nah, leave them alone. They are busy photosynthesising - producing goodness for the plant!

 

By removing the lower branches in particular, it will airate the plants helping to prevent disease and providing more nutrients for the fruit instead of leaf growth.