Gaps caused by braces. (Photos)

I think your orthodontist is doing the right thing. A small gap left behind your canine teeth is far better than over retracting your upper six front teeth. During your lifetime, your second molars exert a tremendous forward thrust on the dental arch that will more than likely close these spaces over time anyway. Good luck!

If you had full or comprehensive treatment there should be no spaces left in this location. 

Your orthodontists works for you.  He/she should only take the braces off when you are both satisfied that the job is complete and the best possible outcome has been achieved.  

Sometimes there are spaces remaining but not often in the location you show.  Ask for some time to discuss this with your orthodontist prior to the appointment to remove them.