more changes

extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/querykit/groupby/GroupByQueryKit.java

@@ -380,7 +380,6 @@ static ClusterBy computeIntermediateClusterBy(final GroupByQuery query)
   static ClusterBy computeClusterByForResults(final GroupByQuery query)
   {
     if (query.getLimitSpec() instanceof DefaultLimitSpec) {
-      final RowSignature resultSignature = computeResultSignature(query);
       final DefaultLimitSpec defaultLimitSpec = (DefaultLimitSpec) query.getLimitSpec();
 
       if (!defaultLimitSpec.getColumns().isEmpty()) {

processing/src/main/java/org/apache/druid/frame/key/RowKeyComparisonRunLengths.java

@@ -28,7 +28,6 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
-import java.util.function.Supplier;
 
 public class RowKeyComparisonRunLengths
 {

processing/src/test/java/org/apache/druid/frame/write/FrameWriterTest.java

@@ -466,7 +466,7 @@ private Sequence<List<Object>> sortIfNeeded(
       final List<String> sortColumnNames
   )
   {
-    final List<KeyColumn> keyColumns = computeSortColumns(sortColumnNames, signature);
+    final List<KeyColumn> keyColumns = computeSortColumns(sortColumnNames);
 
     if (keyColumns.isEmpty()) {
       return rows;
@@ -500,15 +500,15 @@ private Pair<Frame, Integer> writeFrame(
         capabilitiesAdjustFn,
         rows,
         signature,
-        computeSortColumns(sortColumns, signature)
+        computeSortColumns(sortColumns)
     );
   }
 
   /**
    * Converts the provided column names into {@link KeyColumn} according to the current {@link #sortedness}
    * parameter.
    */
-  private List<KeyColumn> computeSortColumns(final List<String> sortColumnNames, final RowSignature rowSignature)
+  private List<KeyColumn> computeSortColumns(final List<String> sortColumnNames)
   {
     if (sortedness == KeyOrder.NONE) {
       return Collections.emptyList();