Stop testing lower-constraints

[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-October/018445.html

Conflicts:
  .zuul.yaml
  lower-constraints.txt

NOTE(stephenfin): Conflicts are due to the changed job template (xena vs
zed) and slightly different lower constraints between branches.

Change-Id: I45e9a81d451c64cdd51f9b606d94161742bacdb7
(cherry picked from commit c677192d51)

.zuul.yaml

@@ -239,7 +239,6 @@
       - openstackclient-plugin-jobs
       - osc-tox-unit-tips
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-xena-jobs
       - publish-openstack-docs-pti
       - check-requirements

lower-constraints.txt

@@ -1,98 +0,0 @@
-amqp==2.1.1
-appdirs==1.3.0
-asn1crypto==0.23.0
-Babel==2.6.0
-bcrypt==3.2.0
-cachetools==2.0.0
-cffi==1.14.0
-cliff==3.5.0
-cmd2==0.8.0
-coverage==4.0
-cryptography==2.7
-ddt==1.0.1
-debtcollector==1.2.0
-decorator==4.4.1
-dogpile.cache==0.6.5
-eventlet==0.18.2
-extras==1.0.0
-fasteners==0.7.0
-fixtures==3.0.0
-future==0.16.0
-futurist==2.1.0
-greenlet==0.4.15
-importlib-metadata==3.1.1
-iso8601==0.1.11
-Jinja2==2.10
-jmespath==0.9.0
-jsonpatch==1.16
-jsonpointer==1.13
-jsonschema==2.6.0
-keystoneauth1==3.18.0
-kombu==4.0.0
-linecache2==1.0.0
-MarkupSafe==1.1.1
-mock==4.0.2
-monotonic==0.6
-mox3==0.20.0
-msgpack-python==0.4.0
-munch==2.1.0
-netaddr==0.7.18
-netifaces==0.10.4
-openstacksdk==0.56.0
-os-client-config==2.1.0
-os-service-types==1.7.0
-osc-lib==2.3.0
-oslo.concurrency==3.26.0
-oslo.config==5.2.0
-oslo.context==2.19.2
-oslo.i18n==3.15.3
-oslo.log==3.36.0
-oslo.messaging==5.29.0
-oslo.middleware==3.31.0
-oslo.serialization==2.18.0
-oslo.service==1.24.0
-oslo.utils==3.33.0
-oslotest==3.2.0
-osprofiler==1.4.0
-paramiko==2.7.1
-Paste==2.0.2
-PasteDeploy==1.5.0
-pbr==2.0.0
-pika==0.10.0
-pika-pool==0.1.3
-prettytable==0.7.2
-pycparser==2.18
-pyinotify==0.9.6
-PyNaCl==1.4.0
-pyparsing==2.1.0
-pyperclip==1.5.27
-python-cinderclient==3.3.0
-python-dateutil==2.5.3
-python-keystoneclient==3.22.0
-python-mimeparse==1.6.0
-python-novaclient==17.0.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.13
-repoze.lru==0.7
-requests==2.14.2
-requests-mock==1.2.0
-requestsexceptions==1.2.0
-rfc3986==0.3.1
-Routes==2.3.1
-simplejson==3.5.1
-six==1.15.0
-statsd==3.2.1
-stestr==1.0.0
-stevedore==2.0.1
-tempest==17.1.0
-tenacity==3.2.1
-testrepository==0.0.18
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-urllib3==1.21.1
-vine==1.1.4
-WebOb==1.7.1
-wrapt==1.7.0
-zipp==3.4.0

requirements.txt

@@ -1,3 +1,7 @@
+# Requirements lower bounds listed here are our best effort to keep them up to
+# date but we do not test them so no guarantee of having them all correct. If
+# you find any incorrect lower bounds, let us know or propose a fix.
+
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.

tox.ini

@@ -138,9 +138,3 @@ exclude = .git,.tox,dist,doc,*lib/python*,*egg,build,tools
 ignore = W504
 import-order-style = pep8
 application_import_names = openstackclient
-
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt