fix checkstyle

Signed-off-by: Haidong <[email protected]>

data-prepper-plugins/kafka-connect-plugins/src/test/java/org/opensearch/dataprepper/plugins/kafkaconnect/source/mongoDB/MongoDBServiceTest.java

@@ -9,7 +9,6 @@
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.Mock;
 import org.mockito.MockedConstruction;
-import org.mockito.MockedStatic;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.opensearch.dataprepper.metrics.PluginMetrics;
 import org.opensearch.dataprepper.model.acknowledgements.AcknowledgementSetManager;
@@ -19,14 +18,8 @@
 import org.opensearch.dataprepper.plugins.kafkaconnect.configuration.MongoDBConfig;
 
 import java.util.Optional;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
 
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mockConstruction;
-import static org.mockito.Mockito.mockStatic;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
@@ -67,8 +60,8 @@ public void testStartAndStop() throws InterruptedException {
 
     private MongoDBService createObjectUnderTest() {
         try (final MockedConstruction<MongoDBPartitionCreationSupplier> mockedConstruction = mockConstruction(MongoDBPartitionCreationSupplier.class, (mock, context) -> {
-                 mongoDBPartitionCreationSupplier = mock;
-             })) {
+            mongoDBPartitionCreationSupplier = mock;
+        })) {
             return MongoDBService.create(mongoDBConfig, sourceCoordinator, buffer, acknowledgementSetManager, pluginMetrics);
         }
     }