You can delete photos whilst browsing your Calendar! When viewing your Calendar, you can click on 
button in the upper, left-hand corner and it will allow you to edit the pages.
Once you are in the editing page, you will see this icon 
on the right side of your calendar. After clicking on it, just click on the photos with the check-mark to remove them from your Calendar.
If you have any questions, please don't hesitate to contact us!