Remove trusty jobs

OpenDev is removing trusty from the infrastructure, remove the jobs
using ubuntu-trusty.

Depends-On: https://review.opendev.org/702817
Change-Id: I0d328f4d1125be7e3801a9dd2c9374086024b903

.zuul.d/jobs.yaml

@@ -85,34 +85,6 @@
       dib_functests:
         - ubuntu-minimal/bionic-arm64-build-succeeds
 
-# Trusty / Python 2 tests
-- job:
-    name: dib-functests-trusty-python2
-    description: |
-      Run the default tests on a Trusty build host with Python 2
-    parent: dib-functests-default
-    nodeset: ubuntu-trusty
-    vars:
-      dib_python: python2
-
-- job:
-    name: dib-functests-trusty-python2-image
-    description: |
-      The image tests on a Trusty build host with Python 2
-    parent: dib-functests-image
-    nodeset: ubuntu-trusty
-    vars:
-      dib_python: python2
-
-- job:
-    name: dib-functests-trusty-python2-extras
-    description: |
-      The extras tests on a Trusty build host with Python 2
-    parent: dib-functests-extras
-    nodeset: ubuntu-trusty
-    vars:
-      dib_python: python2
-
 # Bionic / Python3 tests
 - job:
     name: dib-functests-bionic-python3
@@ -281,21 +253,6 @@
         base_element: fedora-minimal
         release: '30'
 
-- job:
-    name: dib-nodepool-functional-openstack-ubuntu-trusty-src
-    description: |
-      Test building and booting an Ubuntu trusty image with Nodepool
-      and OpenStack
-    parent: dib-nodepool-functional-src-base
-    pre-run: playbooks/dib-nodepool/debootstrap.yaml
-    vars:
-      nodepool_extra_packages:
-        - debootstrap
-      nodepool_diskimage:
-        base_element: ubuntu-minimal
-        release: 'trusty'
-        mirror: "http://{{ zuul_site_mirror_fqdn }}/ubuntu"
-
 - job:
     name: dib-nodepool-functional-openstack-ubuntu-xenial-src
     description: |

.zuul.d/project.yaml

@@ -14,16 +14,12 @@
         - dib-nodepool-functional-openstack-centos-8-src
         - dib-nodepool-functional-openstack-fedora-29-src
         - dib-nodepool-functional-openstack-fedora-30-src
-        - dib-nodepool-functional-openstack-ubuntu-trusty-src
         - dib-nodepool-functional-openstack-ubuntu-xenial-src
         - dib-nodepool-functional-openstack-ubuntu-bionic
         - dib-nodepool-functional-openstack-ubuntu-bionic-src
         - dib-functests-centos7-python2
         - dib-functests-centos7-python2-image
         - dib-functests-centos7-python2-extras
-        - dib-functests-trusty-python2
-        - dib-functests-trusty-python2-image
-        - dib-functests-trusty-python2-extras
         - dib-functests-xenial-python3
         - dib-functests-xenial-python3-image
         - dib-functests-xenial-python3-extras
@@ -42,11 +38,9 @@
         - dib-nodepool-functional-openstack-centos-8-src
         - dib-nodepool-functional-openstack-fedora-29-src
         - dib-nodepool-functional-openstack-fedora-30-src
-        - dib-nodepool-functional-openstack-ubuntu-trusty-src
         - dib-nodepool-functional-openstack-ubuntu-xenial-src
         - dib-nodepool-functional-openstack-ubuntu-bionic
         - dib-nodepool-functional-openstack-ubuntu-bionic-src
-        - dib-functests-trusty-python2
         - dib-functests-xenial-python3
         - dib-functests-centos7-python2
     experimental: