Remove Fedora 28 job

Fedora 28 is end-of-live and gets removed from OpenDev testing,
remove it completely here. Packstack plans to use CentOS 8 instead of
Fedora for Python 3 based distros.

This will be backported to all open branches.

Change-Id: I10f444de465437db31efd438b07ca18497580d82
(cherry picked from commit 28c795eccf)

.zuul.yaml

@@ -42,21 +42,6 @@
           label: centos-7
     run: playbooks/packstack-integration-tempest.yaml
 
-- job:
-    name: packstack-fedora
-    parent: packstack-base
-    vars:
-      # NOTE(jpena) switch this to puppet-passed-ci when available
-      delorean: "https://trunk.rdoproject.org/fedora28-stein/consistent/delorean.repo"
-      delorean_deps: "https://trunk.rdoproject.org/fedora28-stein/delorean-deps.repo"
-      selinux_enforcing: "false"
-    pre-run: playbooks/packstack-fedora-pre.yaml
-    nodeset:
-      nodes:
-        - name: fedora
-          label: fedora-28
-    run: playbooks/packstack-integration-tempest.yaml
-
 - job:
     name: packstack-multinode
     parent: packstack-base
@@ -87,12 +72,6 @@
     vars:
       scenario: scenario003
 
-- job:
-    name: packstack-fedora-integration-scenario-py3-tempest
-    parent: packstack-fedora
-    vars:
-      scenario: scenario-py3
-
 # We should have nested post-run jobs, according to
 # https://docs.openstack.org/infra/zuul/user/config.html#job
 - job:
@@ -109,8 +88,6 @@
         - packstack-integration-scenario002-tempest
         - packstack-integration-scenario003-tempest
         - packstack-multinode-scenario002-tempest
-        - packstack-fedora-integration-scenario-py3-tempest:
-            voting: false
         - openstack-tox-py36:
             voting: false
     gate:

playbooks/packstack-fedora-pre.yaml

@@ -1,28 +0,0 @@
-- hosts: all
-  name: packstack-fedora-pre
-  tasks:
-    - name: Ensure legacy workspace directory
-      file:
-        path: '{{ ansible_user_dir }}/workspace'
-        state: directory
-
-    - shell:
-        cmd: |
-          cp -pr /home/zuul/src/opendev.org/x/packstack {{ ansible_user_dir }}/workspace
-
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          dnf -y install wget
-          rm -rf /etc/yum.repos.d/fedora*
-          wget -O /etc/yum.repos.d/fedora-stable.repo http://trunk.rdoproject.org/fedora/delorean-deps.repo
-          dnf clean all
-          sudo sed -i '/^exclude.*/d' /etc/dnf/dnf.conf
-          dnf -y install libxml2-devel libxslt-devel ruby-devel zlib-devel
-          dnf -y install gcc gettext diffstat doxygen patch patchutils subversion systemtap git python-setuptools wget redhat-lsb-core libselinux-python yum-plugin-priorities dnf-yum virt-what
-          pip uninstall requests -y || true
-        executable: /bin/bash
-        chdir: '{{ ansible_user_dir }}/workspace'
-      become: true
-      environment: '{{ zuul }}'