Zuul: Remove project name

Zuul no longer requires the project-name for in-repo configuration.
Omitting it makes forking or renaming projects easier.

Change-Id: I995154c056dd99b3a2c0ee9f7ddd9077e5686b79
diff --git a/.zuul.yaml b/.zuul.yaml
index 0e73686..5cd0829 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,6 +1,4 @@
----
 - project:
-    name: openstack/tempest-horizon
     check:
       jobs:
         - horizon-dsvm-tempest-plugin