Removing autogen update from Pub/Sub changelog. (#4303)
Removing autogen update from Pub/Sub changelog. (#4303)

That PR didn't end up making it in the release.
tseaver/google-cloud-python,GoogleCloudPlatform/gcloud-python,jonparrott/gcloud-python,dhermes/gcloud-python,jonparrott/gcloud-python,dhermes/google-cloud-python,dhermes/google-cloud-python,tswast/google-cloud-python,jonparrott/google-cloud-python,GoogleCloudPlatform/gcloud-python,dhermes/google-cloud-python,jonparrott/google-cloud-python,tseaver/google-cloud-python,googleapis/google-cloud-python,tseaver/gcloud-python,dhermes/gcloud-python,tseaver/gcloud-python,tseaver/google-cloud-python,googleapis/google-cloud-python,tswast/google-cloud-python,tswast/google-cloud-python