Assume you\'ve selected an object and you have the Size Selector in the Utilities panel open. You can see the list of constraints applied to the object. In the list of constrain
The accepted answer is right, but there is so much frustration with selecting constraints that lay outside of selected view that I decided to add this tips as another answer.
I found incredible list of tips that helped me to solve this problem.
The problem:
Soulution:
Click it with Shift+Ctrl pressed and you'll see a menu of all the views that exist where you've clicked.
To delete selected constraint press delete key.