Bug 31976: Incorrect default category selected by authorized values page

Bug 31976: Incorrect default category selected by authorized values page

This patch removes some obsolete code for selecting a default authorized
value category to be shown when the user first arrives on the authorized
values page. This has not been necessary since we switched to an
interface which lists all categories.

NOTE: This bug will not be reproducible if your first authorized value,
alphabetically, has no values associated with it. For instance, if you
delete all authorized values in the AR_CANCELLATION category.

To test, apply the patch and go to Administration -> Authorized values.

In the breadcrumbs menu you should see "Home -> Administration ->
Authorized values."

Clicking any of the authorized value categories in the list should take
you to a view of that category's values.

Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>