Dropping lower constraints testing (stable Train)

This topic was discussed on the ML and QA team proposed to
to test lower-constraints [1].

As decided in Neutron meeting, stable branches will drop this
CI job [2].

[1]http://lists.openstack.org/pipermail/openstack-discuss/2020-December/019390.html
[2]http://eavesdrop.openstack.org/meetings/networking/2021/networking.2021-01-12-14.00.log.html

Change-Id: Ibf9b20b993ab59b64bd4c954cfcd34f14e0e078c

.zuul.yaml

@@ -6,7 +6,6 @@
     templates:
       - neutron-tempest-plugin-jobs-train
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python-jobs
       - openstack-python3-train-jobs
       - publish-openstack-docs-pti

TESTING.rst

@@ -511,9 +511,9 @@ To run only the unit tests::
 
 Many changes span across both the neutron and neutron-lib repos, and tox
 will always build the test environment using the published module versions
-specified in requirements.txt and lower-constraints.txt. To run tox tests
-against a different version of neutron-lib, use the TOX_ENV_SRC_MODULES
-environment variable to point at a local package repo.
+specified in requirements.txt. To run tox tests against a different version of
+neutron-lib, use the TOX_ENV_SRC_MODULES environment variable to point at a
+local package repo.
 
 For example, to run against the 'master' branch of neutron-lib::
 

lower-constraints.txt

@@ -1,154 +0,0 @@
-alabaster==0.7.10
-alembic==0.8.10
-amqp==2.1.1
-appdirs==1.4.3
-astroid==2.1.0
-Babel==2.3.4
-bandit==1.1.0
-bashate==0.5.1
-beautifulsoup4==4.6.0
-cachetools==2.0.0
-cffi==1.7.0
-cliff==2.8.0
-cmd2==0.8.0
-contextlib2==0.4.0
-coverage==4.0
-ddt==1.0.1
-debtcollector==1.19.0
-decorator==3.4.0
-deprecation==1.0
-docutils==0.11
-dogpile.cache==0.6.2
-dulwich==0.15.0
-eventlet==0.18.2
-extras==1.0.0
-fasteners==0.7.0
-fixtures==3.0.0
-flake8-import-order==0.12
-flake8==2.6.2
-future==0.16.0
-futurist==1.2.0
-gitdb==0.6.4
-GitPython==1.0.1
-greenlet==0.4.10
-hacking==1.1.0
-httplib2==0.9.1
-imagesize==0.7.1
-iso8601==0.1.11
-isort==4.3.21
-Jinja2==2.10
-jmespath==0.9.0
-jsonpatch==1.16
-jsonpointer==1.13
-jsonschema==2.6.0
-keystoneauth1==3.14.0
-keystonemiddleware==4.17.0
-kombu==4.0.0
-linecache2==1.0.0
-logilab-common==1.4.1
-logutils==0.3.5
-Mako==0.4.0
-MarkupSafe==1.0
-mccabe==0.2.1
-mock==3.0.0
-monotonic==0.6;python_version<'3.3'
-mox3==0.20.0
-msgpack-python==0.4.0
-munch==2.1.0
-netaddr==0.7.18
-netifaces==0.10.4
-neutron-lib==1.29.1
-openstackdocstheme==1.30.0
-openstacksdk==0.31.2
-os-client-config==1.28.0
-os-ken==0.3.0
-os-service-types==1.7.0
-os-vif==1.15.1
-os-xenapi==0.3.1
-osc-lib==1.8.0
-oslo.cache==1.26.0
-oslo.concurrency==3.26.0
-oslo.config==5.2.0
-oslo.context==2.19.2
-oslo.db==4.37.0
-oslo.i18n==3.15.3
-oslo.log==3.36.0
-oslo.messaging==5.29.0
-oslo.middleware==3.31.0
-oslo.policy==1.30.0
-oslo.privsep==1.32.0
-oslo.reports==1.18.0
-oslo.rootwrap==5.8.0
-oslo.serialization==2.18.0
-oslo.service==1.24.0
-oslo.upgradecheck==0.1.0
-oslo.utils==3.33.0
-oslo.versionedobjects==1.35.1
-oslotest==3.2.0
-osprofiler==2.3.0
-ovs==2.8.0
-ovsdbapp==0.12.1
-Paste==2.0.2
-PasteDeploy==1.5.0
-pbr==4.0.0
-pecan==1.3.2
-pep8==1.5.7
-pika-pool==0.1.3
-pika==0.10.0
-positional==1.2.1
-prettytable==0.7.2
-psutil==3.2.2
-pycadf==1.1.0
-pycodestyle==2.0.0
-pycparser==2.18
-pyflakes==0.8.1
-Pygments==2.2.0
-pyinotify==0.9.6
-pylint==2.2.0
-PyMySQL==0.7.6
-pyparsing==2.1.0
-pyperclip==1.5.27
-pyroute2==0.5.3
-python-dateutil==2.5.3
-python-designateclient==2.7.0
-python-editor==1.0.3
-python-keystoneclient==3.8.0
-python-mimeparse==1.6.0
-python-neutronclient==6.7.0
-python-novaclient==9.1.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.12
-reno==2.5.0
-repoze.lru==0.7
-requests==2.14.2
-requestsexceptions==1.2.0
-rfc3986==0.3.1
-Routes==2.3.1
-simplejson==3.5.1
-six==1.10.0
-smmap==0.9.0
-snowballstemmer==1.2.1
-Sphinx==1.6.5
-sphinxcontrib-websupport==1.0.1
-sqlalchemy-migrate==0.11.0
-SQLAlchemy==1.2.0
-sqlparse==0.2.2
-statsd==3.2.1
-stestr==1.0.0
-stevedore==1.20.0
-Tempita==0.5.2
-tenacity==3.2.1
-testrepository==0.0.18
-testresources==2.0.0
-testscenarios==0.4
-testtools==2.2.0
-tinyrpc==0.6
-traceback2==1.4.0
-unittest2==1.1.0
-vine==1.1.4
-waitress==1.1.0
-weakrefmethod==1.0.2
-WebOb==1.8.2
-WebTest==2.0.27
-wrapt==1.7.0

tox.ini

@@ -235,11 +235,3 @@ basepython = python3
 # separately, outside of the requirements files.
 deps = bindep
 commands = bindep test
-
-[testenv:lower-constraints]
-basepython = python3
-setenv = OS_TEST_TIMEOUT={env:OS_TEST_TIMEOUT:60}
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt