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: Id4a2f06857e9732b52b9f76ee22409c7b71902fd

.zuul.yaml

@@ -26,7 +26,6 @@
       rtd_webhook_id: '44747'
     templates:
       - openstack-python3-wallaby-jobs
-      - openstack-lower-constraints-jobs
       - docs-on-readthedocs
       - check-requirements
     check:

lower-constraints.txt

@@ -1,146 +0,0 @@
-alabaster==0.7.10
-alembic==1.4.2
-amqp==2.5.2
-appdirs==1.4.3
-automaton==2.0.1
-Babel==2.5.3
-beautifulsoup4==4.9.0
-cachetools==4.1.0
-certifi==2018.1.18
-cffi==1.14.0
-chardet==3.0.4
-cliff==2.11.0
-cmd2==0.8.1
-coverage==4.0
-cryptography==2.9.2
-debtcollector==1.19.0
-decorator==4.4.2
-doc8==0.6.0
-docutils==0.14
-dogpile.cache==0.9.0
-dulwich==0.19.0
-enum-compat==0.0.2
-eventlet==0.20.0
-extras==1.0.0
-fasteners==0.14.1
-fixtures==3.0.0
-flake8==3.7.0
-flake8-import-order==0.17.1
-future==0.16.0
-futurist==2.1.1
-greenlet==0.4.13
-hacking==3.0.0
-idna==2.6
-imagesize==1.0.0
-importlib-metadata==1.6.0
-ironic-lib==2.17.1
-iso8601==0.1.12
-Jinja2==2.10
-jmespath==0.9.5
-jsonpatch==1.25
-jsonpointer==2.0
-jsonschema==2.6.0
-keystoneauth1==3.18.0
-keystonemiddleware==9.0.0
-kombu==4.6.8
-linecache2==1.0.0
-logutils==0.3.5
-Mako==1.1.2
-MarkupSafe==1.0
-mccabe==0.6.0
-monotonic==1.4
-mox3==0.25.0
-msgpack==0.5.6
-munch==2.5.0
-netaddr==0.7.19
-netifaces==0.10.6
-openstacksdk==0.46.0
-os-client-config==1.29.0
-os-service-types==1.7.0
-os-testr==1.0.0
-os-traits==2.3.0
-osc-lib==2.0.0
-oslo.cache==2.3.0
-oslo.concurrency==3.26.0
-oslo.config==5.2.0
-oslo.context==2.22.0
-oslo.db==8.1.0
-oslo.i18n==3.15.3
-oslo.log==3.36.0
-oslo.messaging==12.1.0
-oslo.middleware==4.0.2
-oslo.policy==3.1.0
-oslo.rootwrap==6.0.2
-oslo.serialization==2.25.0
-oslo.service==1.24.0
-oslo.upgradecheck==1.0.1
-oslo.utils==3.40.0
-oslo.versionedobjects==2.0.2
-oslotest==3.2.0
-osprofiler==3.1.0
-Paste==2.0.3
-PasteDeploy==1.5.2
-pbr==2.0.0
-pecan==1.3.3
-pep8==1.5.7
-prettytable==0.7.2
-psutil==5.7.0
-pycadf==3.0.0
-pycodestyle==2.3.1
-pycparser==2.20
-pyflakes==2.1.0
-Pygments==2.2.0
-pyinotify==0.9.6
-pyOpenSSL==19.1.0
-pyparsing==2.2.0
-pyperclip==1.6.0
-pysendfile==2.0.1
-python-cinderclient==7.0.0
-python-dateutil==2.7.0
-python-editor==1.0.4
-python-glanceclient==3.1.1
-python-keystoneclient==4.0.0
-python-mimeparse==1.6.0
-python-neutronclient==7.1.1
-python-subunit==1.0.0
-python-swiftclient==3.9.0
-pytz==2018.3
-PyYAML==3.12
-reno==2.5.0
-repoze.lru==0.7
-requests==2.18.4
-requestsexceptions==1.4.0
-restructuredtext-lint==1.1.3
-retrying==1.3.3
-rfc3986==1.1.0
-Routes==2.4.1
-simplegeneric==0.8.1
-simplejson==3.17.0
-six==1.14.0
-snowballstemmer==1.2.1
-soupsieve==2.0
-SQLAlchemy==1.3.16
-sqlalchemy-migrate==0.13.0
-sqlparse==0.3.1
-statsd==3.3.0
-stestr==2.0.0
-stevedore==1.28.0
-Tempita==0.5.2
-tenacity==6.1.0
-testrepository==0.0.20
-testresources==2.0.1
-testscenarios==0.4
-testtools==2.2.0
-tooz==2.3.0
-traceback2==1.4.0
-unittest2==1.1.0
-urllib3==1.22
-vine==1.3.0
-voluptuous==0.11.1
-waitress==1.4.3
-warlock==1.3.3
-WebOb==1.8.0
-WebTest==2.0.35
-wrapt==1.10.11
-WSME==0.10.0
-zipp==3.1.0