Moving Monitoring to GA section [ci skip] (#3392)

Author: garrettjonesgoogle

README.md

@@ -15,6 +15,7 @@ Java idiomatic client for [Google Cloud Platform][cloud-platform] services.
 This library supports the following Google Cloud Platform services with clients at a [GA](#versioning) quality level:
 -  [BigQuery](google-cloud-clients/google-cloud-bigquery) (GA)
 -  [Stackdriver Logging](google-cloud-clients/google-cloud-logging) (GA)
+-  [Stackdriver Monitoring](google-cloud-clients/google-cloud-monitoring) (GA)
 -  [Cloud Datastore](google-cloud-clients/google-cloud-datastore) (GA)
 -  [Cloud Natural Language](google-cloud-clients/google-cloud-language) (GA)
 -  [Cloud Pub/Sub](google-cloud-clients/google-cloud-pubsub) (GA)
@@ -28,7 +29,6 @@ This library supports the following Google Cloud Platform services with clients
 -  [Cloud Data Loss Prevention](google-cloud-clients/google-cloud-dlp) (Beta)
 -  [Stackdriver Error Reporting](google-cloud-clients/google-cloud-errorreporting) (Beta)
 -  [Cloud Firestore](google-cloud-clients/google-cloud-firestore) (Beta)
--  [Stackdriver Monitoring](google-cloud-clients/google-cloud-monitoring) (Beta)
 -  [Cloud Spanner](google-cloud-clients/google-cloud-spanner) (Beta)
 -  [Cloud Video Intelligence](google-cloud-clients/google-cloud-video-intelligence) (Beta)
 -  [Stackdriver Trace](google-cloud-clients/google-cloud-trace) (Beta)

google-cloud-clients/google-cloud-monitoring/README.md

@@ -12,9 +12,6 @@ Java idiomatic client for [Stackdriver Monitoring][stackdriver-monitoring].
 - [Product Documentation][monitoring-product-docs]
 - [Client Library Documentation][monitoring-client-lib-docs]
 
-> Note: This client is a work-in-progress, and may occasionally
-> make backwards-incompatible changes.
-
 Quickstart
 ----------