Issue #3264628 by gaurav.kapoor: Removed unwanted database access code.

use Drupal\counter\CounterUtility;

use Drupal\Core\Block\BlockBase;

use Drupal\Core\Config\ConfigFactoryInterface;

use Drupal\Core\Database\Connection;

use Drupal\Core\Plugin\ContainerFactoryPluginInterface;

use Drupal\Core\Session\AccountInterface;

use Symfony\Component\DependencyInjection\ContainerInterface;

   */

  protected $requestStack;

  /**

   * The database connection.

   *

   * @var Drupal\Core\Database\Connection

   */

  protected $database;

  /**

   * The account interface for accessing current user.

   *

   *   The config factory for the form.

   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack

   *   The request stack for accessing request information.

   * @param \Drupal\Core\Database\Connection $database

   *   The database connection variable for executing queries.

   * @param \Drupal\Core\Session\AccountInterface $account

   *   The account interface for accessing current user.

   * @param \Drupal\counter\CounterUtility $counter_utility

   *   The counter utility variable to access helper functions.

   */

  public function __construct(array $configuration, $plugin_id, $plugin_definition, ConfigFactoryInterface $config_factory, RequestStack $request_stack, Connection $database, AccountInterface $account, CounterUtility $counter_utility) {

  public function __construct(array $configuration, $plugin_id, $plugin_definition, ConfigFactoryInterface $config_factory, RequestStack $request_stack, AccountInterface $account, CounterUtility $counter_utility) {

    parent::__construct($configuration, $plugin_id, $plugin_definition);

    $this->configFactory = $config_factory;

    $this->requestStack = $request_stack;

    $this->database = $database;

    $this->account = $account;

    $this->counterUtility = $counter_utility;

  }

      $plugin_definition,

      $container->get('config.factory'),

      $container->get('request_stack'),

      $container->get('database'),

      $container->get('current_user'),

      $container->get('counter.counter_utility')

    );

    $data_update = ($interval >= $counter_refresh_delay ? 1 : 0);

    // Read counter_data.

    $sql = " SELECT * FROM {counter_data} ORDER BY counter_name";

    $results = $this->database->query($sql);

    $i = 0;

    foreach ($results as $data) {

      $i++;

      $counter_value[$i] = $data->counter_value;

    }

    $counter_data = $this->counterUtility->getCounterDataTableData();

    // Write output.