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: I92ea13e64dcdc24a8dd1fd6d17df9f771b2fc1e0

Author: James E. Blair

.zuul.yaml

@@ -188,7 +188,6 @@
         - osc-tox-py35-tips
 
 - project:
-    name: openstack/python-openstackclient
     templates:
       - openstackclient-plugin-jobs
       - osc-tox-unit-tips