Remove v1 API tests

The V1 API was removed from Designate in the Queens release. It has now been
eight releases since then, so it is time to remove the tests for it. If these
tests are still needed, please use git tag version 0.11.0 (Wallaby) or older.

Change-Id: I496d02c1be165eeaf721dea2eafe5f6a70279e68
diff --git a/releasenotes/notes/Remove-Designate-V1-tests-8537cfebe7c93976.yaml b/releasenotes/notes/Remove-Designate-V1-tests-8537cfebe7c93976.yaml
new file mode 100644
index 0000000..47a285a
--- /dev/null
+++ b/releasenotes/notes/Remove-Designate-V1-tests-8537cfebe7c93976.yaml
@@ -0,0 +1,7 @@
+---
+other:
+  - |
+    The Designate API V1 tests have been removed. The V1 API was removed
+    from Designate in the Queens release. It has now been eight releases
+    since then, so it is time to remove the tests for it. If these tests are
+    still needed, please use git tag version 0.11.0 (Wallaby) or older.