chore: apply suggestions

Signed-off-by: Dennis Zhuang <killme2008@gmail.com>

Author: killme2008

ingester-integration-tests/pom.xml

@@ -54,9 +54,9 @@
 
         <!-- MySQL JDBC driver for verification -->
         <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
-            <version>8.0.33</version>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.4.0</version>
             <scope>test</scope>
         </dependency>
 

ingester-integration-tests/src/test/java/io/greptime/ITHelper.java

@@ -110,16 +110,6 @@ public static int queryCount(Connection conn, String tableName) throws SQLExcept
         }
     }
 
-    /**
-     * Queries a single row by host and verifies it exists.
-     * Returns the ResultSet for further verification.
-     */
-    public static ResultSet queryByHost(Connection conn, String tableName, String host) throws SQLException {
-        String sql = String.format("SELECT * FROM %s WHERE host = '%s'", tableName, host);
-        Statement stmt = conn.createStatement();
-        return stmt.executeQuery(sql);
-    }
-
     /**
      * Verifies that a specific row exists with expected values.
      */