docs: comment

docs/examples/java/src/main/java/com/taos/example/ConnectCloudExample.java

@@ -12,7 +12,6 @@ public class ConnectCloudExample {
         String jdbcUrl = System.getenv("TDENGINE_JDBC_URL");
         try(Connection conn = DriverManager.getConnection(jdbcUrl)) {
             try(Statement stmt = conn.createStatement()) {
-                // test the connection by execute a query
                 stmt.executeQuery("select server_version()");
             }
         }