Excise DLP. (googleapis#2706)

It is now staged at https://github.com/googleapis/nodejs-dlp

Author: lukesneeringer

README.md

@@ -19,6 +19,7 @@ This client supports the following Google Cloud Platform services at a [General
 
 This client supports the following Google Cloud Platform services at a [Beta](#versioning) quality level:
 
+* [Cloud Data Loss Prevention](https://github.com/googleapis/nodejs-dlp) (Beta)
 * [Cloud Firestore](https://github.com/googleapis/nodejs-firestore/) (Beta)
 * [Cloud Pub/Sub](#cloud-pubsub-beta) (Beta)
 * [Cloud Spanner](https://github.com/googleapis/nodejs-spanner/) (Beta)