Update server/src/test/java/org/elasticsearch/action/bulk/BulkOperationTests.java

Co-authored-by: Copilot <[email protected]>

Author: lukewhiting

server/src/test/java/org/elasticsearch/action/bulk/BulkOperationTests.java

@@ -251,7 +251,7 @@ public class BulkOperationTests extends ESTestCase {
     private TestThreadPool threadPool;
 
     private StreamsPermissionsUtils streamsPermissionsUtilsMock;
-    private ProjectResolver projectResolverMock;
+// Removed the unused projectResolverMock field.
     private IndexNameExpressionResolver indexNameExpressionResolverMock;
 
     @Before