Yes i have done that in the past. I look at the plant and see if it's a good candidate for a cola without side shots. If its a plant that has short spacing between nodes, I will remove all the secondary colas, especially the lower ones. But if it looks like it's going to be tall with not many nodes i will leave the secondary colas to give the plant some body and get more bud sights. It's not rocket science, and just depends on how i feel about the plant. I do find that when i remove the lower colas the plant puts more energy into the tops and i get better buds from whats left. It's like growing tomatos,, do you pull off the suckers or let them grow out and have tomatos on them or pull them and get bigger tomatos but fewer. Either way, it's all good.