chore: delete migrated samples (#495)

* chore: delete migrated samples

* rename readme

* Update samples/snippets/README.rst

Co-authored-by: Dan Lee <71398022+dandhlee@users.noreply.github.com>

---------

Co-authored-by: Dan Lee <71398022+dandhlee@users.noreply.github.com>

Author: Sita04

samples/snippets/README.rst

@@ -0,0 +1,2 @@
+The DLP samples have moved to a new repository (https://github.com/GoogleCloudPlatform/python-docs-samples/tree/main/dlp/snippets) in PR: https://github.com/GoogleCloudPlatform/python-docs-samples/pull/9091
+Moving forward, all DLP samples will be added/ updated in the python-docs-samples repository.