Have you tried a google search for 'photoshop elements remove braces'? It will return tutorials for both elements & full photoshop, but one could check them out to get a general idea of different techniques.
I have some ideas, but won't speculate without seeing the image.
For more definite assistance, try posting the image.
Teresa, Here's a few links on how to remove braces. After you've done it post the before and after so we can see how you did ... and let us know how hard it was!