Remove Sahara tests from Tempest

I think now is a good time. It's been sitting here for ages. We
really should try to make Tempest smaller.

Change-Id: I3370a146042f23a5ba2ca40d2ddf76e7c9e9cf0f
diff --git a/releasenotes/notes/remove-sahara-tests-1532c47c7df80e3a.yaml b/releasenotes/notes/remove-sahara-tests-1532c47c7df80e3a.yaml
new file mode 100644
index 0000000..b541cf9
--- /dev/null
+++ b/releasenotes/notes/remove-sahara-tests-1532c47c7df80e3a.yaml
@@ -0,0 +1,4 @@
+---
+upgrade:
+  - All tests for the Sahara project have been removed from Tempest. They now
+    live as a Tempest plugin in the ``openstack/sahara-tests`` repository.