Remove lower-constraints job

As discussed during the upstream ironic community meeting on
Monday Dec 14 2020, the lower-constraints job is being removed.

Change-Id: Ie7a44dd1636ecce5e71a17763fda8ba96c111838

lower-constraints.txt

@@ -1,64 +0,0 @@
-alabaster==0.7.10
-appdirs==1.3.0
-Babel==2.3.4
-click==6.7
-coverage==4.0
-decorator==4.4.2
-deprecation==2.1.0
-docutils==0.12
-dogpile.cache==0.9.1
-dulwich==0.15.0
-entrypoints==0.3
-extras==1.0.0
-fixtures==3.0.0
-flake8==3.7.9
-flake8-import-order==0.17.1
-Flask==1.0.2
-future==0.18.2
-hacking==3.1.0
-imagesize==0.7.1
-iso8601==0.1.11
-itsdangerous==0.24
-Jinja2==2.10
-jmespath==0.9.5
-jsonpatch==1.25
-jsonpointer==2.0
-keystoneauth1==3.4.0
-libvirt-python==6.0.0
-linecache2==1.0.0
-MarkupSafe==1.1.1
-mccabe==0.6.1
-mox3==0.20.0
-munch==2.1.0
-netifaces==0.10.9
-openstackdocstheme==2.2.1
-openstacksdk==0.13.0
-os-client-config==2.1.0
-os-service-types==1.7.0
-oslotest==3.2.0
-packaging==20.3
-pbr==2.0.0
-pycodestyle==2.5.0
-pyflakes==2.1.1
-Pygments==2.2.0
-pyparsing==2.4.7
-python-mimeparse==1.6.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.13
-reno==3.1.0
-requests==2.14.2
-requestsexceptions==1.2.0
-six==1.14.0
-snowballstemmer==1.2.1
-Sphinx==2.0.0
-sphinxcontrib-websupport==1.0.1
-stestr==1.0.0
-stevedore==1.20.0
-tenacity==6.2.0
-testrepository==0.0.20
-testscenarios==0.4
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-Werkzeug==0.14

zuul.d/project.yaml

@@ -2,7 +2,6 @@
     templates:
       - openstack-python3-wallaby-jobs
       - check-requirements
-      - openstack-lower-constraints-jobs
       - release-notes-jobs-python3
       - publish-openstack-docs-pti
     check: