Removed unused code that is over 2 years old.

**Description**

Originally added in commit [6dd47547c769469120ca6ee221aade6f977aea23](https://github.com/edx/edx-platform/commit/6dd47547c769469120ca6ee221aade6f977aea23), I think this code is safe to remove.

**Reviewers**

- @cpennington