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

Change-Id: Id32dd2ffe030ce58c9f0861310b5f08f7a02eb94

.zuul.yaml

@@ -1,7 +1,6 @@
 - project:
     templates:
       - check-requirements
-      - openstack-lower-constraints-jobs
       - openstack-python3-zed-jobs
       - publish-openstack-docs-pti
     check:

lower-constraints.txt

@@ -1,114 +0,0 @@
-alabaster==0.7.10
-alembic==0.9.8
-appdirs==1.4.3
-asn1crypto==0.24.0
-astroid==1.3.8
-Babel==2.5.3
-botocore==1.9.7
-certifi==2018.1.18
-cffi==1.11.5
-chardet==3.0.4
-cliff==2.11.0
-cmd2==0.8.1
-coverage==4.5.1
-cryptography==2.1.4
-debtcollector==1.19.0
-decorator==4.2.1
-deprecation==2.0
-docutils==0.14
-dogpile.cache==0.6.5
-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
-future==0.16.0
-greenlet==0.4.13
-httplib2==0.10.3
-idna==2.6
-imagesize==1.0.0
-iso8601==0.1.12
-Jinja2==2.10
-jmespath==0.9.3
-jsonpatch==1.21
-jsonpointer==2.0
-jsonschema==2.6.0
-keystoneauth1==3.14.0
-linecache2==1.0.0
-logilab-common==1.4.1
-lxml==4.1.1
-Mako==1.0.7
-MarkupSafe==1.1.1
-mccabe==0.6.0
-monotonic==1.4
-mox3==0.25.0
-msgpack==0.5.6
-munch==2.2.0
-netaddr==0.7.19
-netifaces==0.10.6
-nose==1.3.7
-openstacksdk==0.12.0
-os-api-ref==1.5.0
-os-client-config==1.29.0
-os-service-types==1.2.0
-osc-lib==1.10.0
-oslo.cache==1.29.0
-oslo.concurrency==3.26.0
-oslo.config==5.2.0
-oslo.context==2.20.0
-oslo.db==4.40.0
-oslo.i18n==3.20.0
-oslo.log==3.37.0
-oslo.serialization==2.25.0
-oslo.service==1.30.0
-oslo.utils==3.36.0
-oslotest==3.3.0
-packaging==17.1
-Paste==2.0.3
-PasteDeploy==1.5.2
-pbr==3.1.1
-prettytable==0.7.2
-Pygments==2.2.0
-pyinotify==0.9.6
-pylint==1.4.5
-pyOpenSSL==17.5.0
-pyparsing==2.2.0
-pyperclip==1.6.0
-python-cinderclient==3.5.0
-python-dateutil==2.7.0
-python-editor==1.0.3
-python-glanceclient==2.16.0
-python-keystoneclient==3.15.0
-python-mimeparse==1.6.0
-python-neutronclient==6.7.0
-python-novaclient==10.1.0
-python-openstackclient==3.14.0
-python-subunit==1.2.0
-pytz==2018.3
-PyYAML==3.13
-repoze.lru==0.7
-requests==2.18.4
-requestsexceptions==1.4.0
-rfc3986==1.1.0
-Routes==2.4.1
-simplejson==3.13.2
-six==1.11.0
-snowballstemmer==1.2.1
-SQLAlchemy==1.2.5
-sqlalchemy-migrate==0.11.0
-sqlparse==0.2.4
-stestr==2.0.0
-stevedore==1.28.0
-Tempita==0.5.2
-testrepository==0.0.20
-testresources==2.0.1
-testscenarios==0.5.0
-testtools==2.3.0
-traceback2==1.4.0
-unittest2==1.1.0
-urllib3==1.22
-voluptuous==0.11.1
-warlock==1.3.0
-WebOb==1.7.4
-wrapt==1.10.11

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

@@ -63,9 +63,3 @@ max-complexity=25
 extension =
     N537 = checks:no_translate_logs
 paths = ./ec2api/hacking
-
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/doc/requirements.txt