Drop lower constraint job

Change-Id: I04bf9d5dc0955abe832586070e92b3c6c7f76eb0

.zuul.yaml

@@ -161,7 +161,6 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-zed-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3

lower-constraints.txt

@@ -1,168 +0,0 @@
-alabaster==0.7.10
-alembic==0.9.8
-amqp==2.6.1
-appdirs==1.4.3
-asn1crypto==0.24.0
-Babel==2.5.3
-bandit==1.4.0
-bcrypt==3.1.4
-beautifulsoup4==4.6.0
-cachetools==2.0.1
-certifi==2018.1.18
-cffi==1.14.0
-chardet==3.0.4
-cliff==2.11.0
-click==6.7
-cmd2==0.8.1
-contextlib2==0.5.5
-cotyledon==1.5.0
-coverage==5.3
-cryptography==2.5
-debtcollector==1.19.0
-decorator==4.2.1
-deprecation==2.0
-dnspython==1.15.0
-doc8==0.8.1
-docker==4.3.0
-docker-pycreds==0.2.2
-docutils==0.14
-dogpile.cache==0.6.5
-dulwich==0.19.0
-enum-compat==0.0.2
-eventlet==0.28.0
-extras==1.0.0
-fasteners==0.14.1
-fixtures==3.0.0
-future==0.16.0
-futurist==1.6.0
-Flask==0.12.3
-gitdb2==2.0.3
-GitPython==2.1.8
-greenlet==0.4.15
-grpcio==1.25.0
-idna==2.6
-itsdangerous==0.24
-imagesize==1.0.0
-iso8601==0.1.12
-Jinja2==2.10
-jmespath==0.9.3
-jsonpointer==2.0
-jsonschema==2.6.0
-jsonpatch==1.16
-keystoneauth1==3.14.0
-keystonemiddleware==9.0.0
-kuryr-lib==0.5.0
-kombu==5.0.1
-linecache2==1.0.0
-logutils==0.3.5
-Mako==1.0.7
-MarkupSafe==1.1.1
-mccabe==0.6.0
-monotonic==1.4
-msgpack==0.6.0
-munch==2.2.0
-netifaces==0.10.6
-neutron-lib==1.13.0
-netaddr==0.7.18
-numpy==1.19.0
-openstacksdk==0.15.0
-os-api-ref==1.4.0
-os-brick==3.1.0
-os-client-config==1.29.0
-os-resource-classes==0.1.0
-os-service-types==1.2.0
-os-traits==0.15.0
-os-vif==1.15.1
-os-win==4.2.0
-osc-lib==2.1.0
-oslo.cache==2.4.0
-oslo.concurrency==4.1.0
-oslo.config==8.1.0
-oslo.context==3.1.0
-oslo.db==8.2.0
-oslo.i18n==5.0.0
-oslo.log==4.2.0
-oslo.messaging==12.2.0
-oslo.middleware==4.1.0
-oslo.policy==3.6.0
-oslo.privsep==2.2.0
-oslo.serialization==3.2.0
-oslo.service==2.2.0
-oslo.upgradecheck==1.3.0
-oslo.utils==4.5.0
-oslo.versionedobjects==2.1.0
-oslo.rootwrap==5.8.0
-oslotest==4.4.1
-osprofiler==3.4.0
-ovs==2.8.0
-ovsdbapp==1.4.0
-packaging==20.4
-paramiko==2.7.1
-Paste==2.0.3
-PasteDeploy==1.5.2
-pbr==5.5.0
-pecan==1.3.3
-pika==0.10.0
-pika-pool==0.1.3
-prettytable==0.7.2
-protobuf==3.6.0
-psutil==3.2.2
-pyasn1==0.4.2
-pycadf==2.7.0
-pycparser==2.18
-pyroute2==0.5.7
-Pygments==2.7.2
-pyinotify==0.9.6
-PyMySQL==0.7.6
-PyNaCl==1.2.1
-pyOpenSSL==17.5.0
-pyparsing==2.2.0
-pyperclip==1.6.0
-python-cinderclient==7.1.0
-python-dateutil==2.7.0
-python-editor==1.0.3
-python-etcd==0.4.3
-python-glanceclient==3.2.0
-python-keystoneclient==3.20.0
-python-mimeparse==1.6.0
-python-neutronclient==7.2.0
-python-subunit==1.4.0
-python-zunclient==4.1.0
-pytz==2020.4
-PyYAML==5.1
-repoze.lru==0.7
-requests==2.20.1
-requestsexceptions==1.4.0
-restructuredtext-lint==1.1.3
-retrying==1.3.3
-rfc3986==1.2.0
-Routes==2.4.1
-simplegeneric==0.8.1
-simplejson==3.13.2
-smmap2==2.0.3
-snowballstemmer==1.2.1
-SQLAlchemy==1.2.0
-sqlalchemy-migrate==0.11.0
-sqlparse==0.2.4
-statsd==3.2.2
-stestr==3.1.0
-stevedore==3.3.0
-tempest==17.1.0
-Tempita==0.5.2
-tenacity==6.0.0
-testrepository==0.0.20
-testresources==2.0.0
-testscenarios==0.4
-testtools==2.4.0
-traceback2==1.4.0
-unittest2==1.1.0
-urllib3==1.24.2
-vine==1.1.4
-voluptuous==0.11.1
-waitress==1.1.0
-warlock==1.3.1
-WebOb==1.8.1
-websocket-client==0.44.0
-websockify==0.8.0
-WebTest==2.0.29
-wrapt==1.10.11

tox.ini

@@ -149,13 +149,6 @@ commands =
   rm -rf api-ref/build
   sphinx-build -W --keep-going -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html
 
-[testenv:lower-constraints]
-basepython = python3
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
-
 # This environment can be used to quickly validate that all needed system
 # packages required to successfully execute test targets are installed
 [testenv:bindep]