nit: remove redundant/wrong Pub/Sub region tag [(#4027)](https://github.com/GoogleCloudPlatform/python-docs-samples/issues/4027)
nit: remove redundant/wrong Pub/Sub region tag [(#4027)](https://github.com/GoogleCloudPlatform/python-docs-samples/issues/4027)


googleapis/python-pubsub,googleapis/python-pubsub