Remove maybe-stale norelease pattern

This commit removes an old norelease pattern that has been in the
codebase since late 2015. Given its age, and that it is failing a new CI
job that we added, I am electing to remove it.

Author: jasontedor

core/src/test/java/org/elasticsearch/search/aggregations/metrics/FilterTests.java

@@ -29,9 +29,6 @@ public class FilterTests extends BaseAggregationTestCase<FilterAggregationBuilde
     protected FilterAggregationBuilder createTestAggregatorBuilder() {
         FilterAggregationBuilder factory = new FilterAggregationBuilder(randomAlphaOfLengthBetween(1, 20),
                 QueryBuilders.termQuery(randomAlphaOfLengthBetween(5, 20), randomAlphaOfLengthBetween(5, 20)));
-        // NORELEASE make RandomQueryBuilder work outside of the
-        // AbstractQueryTestCase
-        // builder.query(RandomQueryBuilder.createQuery(getRandom()));
         return factory;
     }