Drop lower-constraints.txt and its testing

As discussed in TC PTG[1] and TC resolution[2], we are
dropping the lower-constraints.txt file and its testing.
We will keep lower bounds in the requirements.txt file but
with a note that these are not tested lower bounds and we
try our best to keep them updated.

[1] https://etherpad.opendev.org/p/tc-zed-ptg#L326
[2] https://governance.openstack.org/tc/resolutions/20220414-drop-lower-constraints.html#proposal

Conflicts:
	.zuul.yaml

Change-Id: I703229320320295b4a90e72c543f8959f85daaa9
(cherry picked from commit 49cbb92ed6)

.zuul.yaml

@@ -184,7 +184,6 @@
 - project:
     templates:
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-yoga-jobs
       - openstack-python3-yoga-jobs-arm64
       - periodic-stable-jobs

lower-constraints.txt

@@ -1,161 +0,0 @@
-alembic==0.9.8
-amqp==2.6.0
-aodhclient==0.9.0
-appdirs==1.4.3
-asn1crypto==0.24.0
-Babel==2.3.4
-bandit==1.1.0
-bcrypt==3.1.4
-cachetools==2.0.1
-certifi==2018.1.18
-cffi==1.14.0
-chardet==3.0.4
-cliff==2.11.0
-cmd2==0.8.1
-contextlib2==0.5.5
-coverage==4.0
-croniter==0.3.4
-cryptography==2.5
-ddt==1.4.1
-debtcollector==1.19.0
-decorator==4.3.0
-deprecation==2.0
-doc8==0.8.1
-docker-pycreds==0.2.2
-docker==3.1.1
-docutils==0.13.1
-dogpile.cache==0.6.5
-enum-compat==0.0.2
-eventlet==0.18.2
-extras==1.0.0
-fasteners==0.14.1
-fixtures==3.0.0
-flake8==3.7.0
-future==0.16.0
-futurist==1.6.0
-gitdb2==2.0.3
-GitPython==2.1.8
-greenlet==0.4.17
-idna==2.6
-iso8601==0.1.12
-Jinja2==2.10
-jmespath==0.9.3
-jsonpatch==1.21
-jsonpointer==2.0
-jsonschema==2.6.0
-keystoneauth1==3.18.0
-keystonemiddleware==5.1.0
-kombu==5.0.1
-linecache2==1.0.0
-lxml==4.5.0
-Mako==1.0.7
-MarkupSafe==1.1.1
-mccabe==0.6.0
-mock==3.0.3
-monotonic==1.4
-mox3==0.28.0
-msgpack==0.5.6
-msgpack-python==0.5.6
-munch==2.2.0
-netaddr==0.7.18
-netifaces==0.10.6
-neutron-lib==1.14.0
-openstacksdk==0.28.0
-os-client-config==1.29.0
-os-service-types==1.2.0
-osc-lib==1.10.0
-oslo.cache==1.26.0
-oslo.concurrency==3.26.0
-oslo.config==6.8.0
-oslo.context==2.22.0
-oslo.db==6.0.0
-oslo.i18n==3.20.0
-oslo.log==4.3.0
-oslo.messaging==5.29.0
-oslo.middleware==3.31.0
-oslo.policy==3.7.0
-oslo.reports==1.18.0
-oslo.serialization==2.25.0
-oslo.service==1.24.0
-oslo.upgradecheck==1.3.0
-oslo.utils==4.5.0
-oslo.versionedobjects==1.31.2
-oslotest==3.2.0
-osprofiler==1.4.0
-packaging==20.4
-paramiko==2.7.1
-Paste==2.0.3
-PasteDeploy==1.5.0
-pbr==3.1.1
-pika-pool==0.1.3
-pika==0.10.0
-ply==3.11
-prettytable==0.7.2
-psutil==5.4.3
-pyasn1==0.4.2
-pycadf==2.7.0
-pycparser==2.18
-Pygments==2.2.0
-pyinotify==0.9.6
-PyMySQL==0.8.0
-PyNaCl==1.2.1
-pyOpenSSL==17.5.0
-pyparsing==2.2.0
-pyperclip==1.6.0
-python-barbicanclient==4.5.2
-python-blazarclient===1.0.1
-python-cinderclient==3.3.0
-python-dateutil==2.7.0
-python-designateclient==2.7.0
-python-editor==1.0.3
-python-glanceclient==2.8.0
-python-heatclient==1.10.0
-python-ironicclient==2.8.0
-python-keystoneclient==3.8.0
-python-magnumclient==2.3.0
-python-manilaclient==1.16.0
-python-mimeparse==1.6.0
-python-mistralclient==3.1.0
-python-monascaclient==1.12.0
-python-neutronclient==6.14.0
-python-novaclient==9.1.0
-python-octaviaclient==1.8.0
-python-openstackclient==3.12.0
-python-saharaclient==1.4.0
-python-subunit==1.2.0
-python-swiftclient==3.2.0
-python-troveclient==2.2.0
-python-vitrageclient==2.7.0
-python-zaqarclient==1.3.0
-python-zunclient==3.4.0
-pytz==2013.6
-PyYAML==5.1
-repoze.lru==0.7
-requests==2.23.0
-requestsexceptions==1.4.0
-rfc3986==1.2.0
-Routes==2.3.1
-simplejson==3.13.2
-smmap2==2.0.3
-sqlalchemy-migrate==0.13.0
-SQLAlchemy==1.0.10
-sqlparse==0.2.4
-statsd==3.2.2
-stestr==2.0.0
-stevedore==3.1.0
-tempest==17.1.0
-Tempita==0.5.2
-tenacity==6.1.0
-testresources==2.0.0
-testscenarios==0.4
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-urllib3==1.22
-vine==1.1.4
-voluptuous==0.11.1
-warlock==1.2.0
-WebOb==1.7.1
-websocket-client==0.47.0
-wrapt==1.10.11
-yaql==1.1.3

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

@@ -153,10 +153,3 @@ commands =
 deps = bindep
 commands = bindep test
 usedevelop = False
-
-[testenv:lower-constraints]
-install_command = pip install {opts} {packages}
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt