fix: remove pre launch comments from enableConnectionPool (#2215)

* fix: remove pre launch comments from enableConnectionPool * . * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md --------- Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: yirutang

README.md

@@ -50,7 +50,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.19.0')
+implementation platform('com.google.cloud:libraries-bom:26.20.0')
 
 implementation 'com.google.cloud:google-cloud-bigquerystorage'
 ```

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/JsonStreamWriter.java

@@ -313,8 +313,7 @@ public Builder setReconnectAfter10M(boolean reconnectAfter10M) {
 
  /**
  * Enable multiplexing for this writer. In multiplexing mode tables will share the same
- * connection if possible until the connection is overwhelmed. This feature is still under
- * development, please contact write api team before using.
+ * connection if possible until the connection is overwhelmed.
  *
  * @param enableConnectionPool
  * @return Builder

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/StreamWriter.java

@@ -636,8 +636,7 @@ public Builder setEndpoint(String endpoint) {
 
  /**
  * Enable multiplexing for this writer. In multiplexing mode tables will share the same
- * connection if possible until the connection is overwhelmed. This feature is still under
- * development, please contact write api team before using.
+ * connection if possible until the connection is overwhelmed.
  *
  * @param enableConnectionPool
  * @return Builder