I stripped out the AbstractEnumField as part of removing the deprecated EnumField in favour of EnumFieldType in https://github.com/apache/solr/pull/3256. This simplifies our class hierarchy, and I don't think we expect other folks to be extending it?
Specific commit: https://github.com/apache/solr/pull/3256/commits/6fa97c1173f0c533095cd73f60c15783ca401a59 Would another set of eyes on this.... Eric
