Bump edx-enterprise to 0.46.8.

This removes the `require_account_level_consent` field
without a migration.

The migration comes next.

requirements/edx/base.txt

@@ -49,7 +49,7 @@ edx-lint==0.4.3
 astroid==1.3.8
 edx-django-oauth2-provider==1.2.5
 edx-django-sites-extensions==2.3.0
-edx-enterprise==0.46.7
+edx-enterprise==0.46.8
 edx-oauth2-provider==1.2.2
 edx-opaque-keys==0.4.0
 edx-organizations==0.4.6