/**
 * Implements hook_block_view_alter().
 */
function {{ machine_name }}_block_view_alter(array &$build, \Drupal\Core\Block\BlockPluginInterface $block) {
  // Remove the contextual links on all blocks that provide them.
  if (isset($build['#contextual_links'])) {
    unset($build['#contextual_links']);
  }
}