chore(functions): show client library init (GoogleCloudPlatform#4713)

Author: Ace Nassri

functions/pubsub/main.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# [START functions_pubsub_setup]
+# [START functions_pubsub_publish]
 import base64
 import json
 import os
@@ -23,10 +23,8 @@
 # Instantiates a Pub/Sub client
 publisher = pubsub_v1.PublisherClient()
 PROJECT_ID = os.getenv('GCP_PROJECT')
-# [END functions_pubsub_setup]
 
 
-# [START functions_pubsub_publish]
 # Publishes a message to a Cloud Pub/Sub topic.
 def publish(request):
     request_json = request.get_json(silent=True)