Google\Cloud\PubSub\Connection\ConnectionInterface::deleteSubscription PHP Method

    public function deleteSubscription(array $args);

 /**
  * Delete a subscription
  *
  * Example:
  * ```
  * $subscription = $pubsub->subscription('my-new-subscription');
  * $subscription->delete();
  * ```
  *
  * @see https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.subscriptions/delete Delete Subscription
  *
  * @param array $options [optional] Configuration Options.
  * @return void
  */
 public function delete(array $options = [])
 {
     $this->connection->deleteSubscription($options + ['subscription' => $this->name]);
 }