Remove "Save access settings" button for depositor

When logged in as a depositor and viewing a collection, you see the "Save access settings" button but they aren't allowed to change that and they don't even have the radio buttons to chose from. I removed the button so it looks a little cleaner.
Merge pull request #109 from avalonmediasystem/bugfix/VOV-1796

Remove "Save access settings" button for depositor