diff --git a/dao/src/main/java/org/thingsboard/server/dao/sql/event/HsqlEventCleanupRepository.java b/dao/src/main/java/org/thingsboard/server/dao/sql/event/HsqlEventCleanupRepository.java
index 6b4b90e198..7ea832ee32 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/sql/event/HsqlEventCleanupRepository.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/sql/event/HsqlEventCleanupRepository.java
@@ -22,7 +22,6 @@ import org.thingsboard.server.dao.util.HsqlDao;
 
 import java.sql.Connection;
 import java.sql.PreparedStatement;
-import java.sql.ResultSet;
 import java.sql.SQLException;
 
 @Slf4j