removed unused job gate-openstack-chef-repo

* the gate-openstack-chef-repo job has not been used since a long time and does
  not work anymore (was replaced with with gate-openstack-chef-rake job)

Change-Id: If91e488ad8efd31c19e361bbe6e169841cc87c4e

jenkins/jobs/chef-jobs.yaml

@@ -62,24 +62,6 @@
     publishers:
       - console-log
 
-- job:
-    name: gate-openstack-chef-repo
-    node: bare-precise
-
-    builders:
-      - gerrit-git-prep
-      - ruby-191-prep
-      - chef-bundler-prep
-      - revoke-sudo
-      - chef-berkshelf-prep
-      - shell: |
-          #!/bin/bash -xe
-          # Validates roles
-          bundle exec spiceweasel infrastructure.yml --debug
-
-    publishers:
-      - console-log
-
 - job-group:
     name: chef-test-jobs
     jobs:

jenkins/jobs/projects.yaml

@@ -3923,7 +3923,6 @@
     node: bare-trusty
 
     jobs:
-      - gate-openstack-chef-repo
       - chef-test-jobs
 
 - project:

zuul/layout.yaml

@@ -7275,10 +7275,6 @@ projects:
     template:
       - name: merge-check
       - name: chef-rake-jobs
-    check:
-      - gate-openstack-chef-repo
-    gate:
-      - gate-openstack-chef-repo
     periodic:
       - periodic-openstack-chef-repo-chef-rake-integration