Deprecate the dvr_extra_resources config switch.

It was added to support the Liberty Release which we don't support
anymore.

Change-Id: I832923ee930f11111623583854ae2511f70f2dd2
diff --git a/releasenotes/notes/deprecate-dvr_extra_resources-config-8c319d6dab7f7e5c.yaml b/releasenotes/notes/deprecate-dvr_extra_resources-config-8c319d6dab7f7e5c.yaml
new file mode 100644
index 0000000..c3e43ee
--- /dev/null
+++ b/releasenotes/notes/deprecate-dvr_extra_resources-config-8c319d6dab7f7e5c.yaml
@@ -0,0 +1,7 @@
+---
+deprecations:
+  - |
+    The ``dvr_extra_resources`` configuration switch from the ``config`` module
+    is deprecated. It was added to support the Liberty Release which we don't
+    support anymore.
+