code: public Void deleteSubscription(String topicPath, String subscriptionName) throws ServiceBusException, InterruptedException {
          return Utils.completeFuture(this.asyncClient.deleteSubscriptionAsync(topicPath, subscriptionName));
      }
docs: Deletes the subscription described by the topicPath and the subscriptionName.
  @param topicPath - The name of the topic.
  @param subscriptionName - The name of the subscription.
  @throws IllegalArgumentException - path is not null / empty / too long / invalid.
  @throws TimeoutException - The operation times out. The timeout period is initiated through ClientSettings.operationTimeout
  @throws AuthorizationFailedException - No sufficient permission to perform this operation. Please check ClientSettings.tokenProvider has correct details.
  @throws ServerBusyException - The server is busy. You should wait before you retry the operation.
  @throws ServiceBusException - An internal error or an unexpected exception occurred.
  @throws MessagingEntityNotFoundException - An entity with this name does not exist.
  @throws InterruptedException if the current thread was interrupted