fix imports

Author: imotov

x-pack/plugin/analytics/src/test/java/org/elasticsearch/xpack/analytics/ttest/TTestAggregatorTests.java

@@ -36,15 +36,12 @@
 import org.elasticsearch.search.aggregations.bucket.histogram.HistogramAggregationBuilder;
 import org.elasticsearch.search.aggregations.bucket.histogram.InternalHistogram;
 import org.elasticsearch.search.aggregations.support.AggregationInspectionHelper;
-import org.elasticsearch.search.aggregations.support.CoreValuesSourceType;
 import org.elasticsearch.search.aggregations.support.MultiValuesSourceFieldConfig;
-import org.elasticsearch.search.aggregations.support.ValuesSourceType;
 import org.elasticsearch.search.lookup.LeafDocLookup;
 
 import java.io.IOException;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.function.Consumer;
 import java.util.function.Function;