SOLR-5729: Remove CHANGES entry in trunk, went into 4.7


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1569845 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5453: some trivial refactoring to postingshighlighter

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1569851 13f79535-47bb-0310-9956-ffa450edef68