Remove bare-trusty lines

We do not need the "node: bare-trusty" lines in projects.yaml anymore,
remove them.

Change-Id: I391ae7d99aadd602d6e0e2f222feb91c0d34d0af
Depends-On: I563d1fc1a899ccd0f0d9e7ebb188f96dd43013b5

doc/source/creators.rst

@@ -461,9 +461,9 @@ repositories. Find the right section and then add a new stanza like:
 
  - project:
     name: <projectname>
-    node: bare-trusty
     tarball-site: tarballs.openstack.org
     doc-publisher-site: docs.openstack.org
+
     jobs:
       - python-jobs
       - openstack-publish-jobs
@@ -1155,7 +1155,6 @@ including the following changes:
 
       - project:
           name: <projectname>
-          node: bare-trusty
 
           jobs:
             - translation-jobs