Drop lower-constraints

Per our PTG resolution [1] and general OpenStack resolution [2], lower-constraints
are not worth the extra work and confusion they introduce.
This patch drops them along with all mentions.

[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-October/018445.html
[2] http://lists.openstack.org/pipermail/openstack-discuss/2020-December/019521.html

Change-Id: I4c65a428facdf6d4ce28d97a868589aeae4c856e

lower-constraints.txt

@@ -1,87 +0,0 @@
-alabaster==0.7.10
-ansible==2.9.0
-appdirs==1.4.3
-asn1crypto==0.24.0
-Babel==2.5.3
-bandit==1.1.0
-bashate==0.5.1
-beautifulsoup4==4.6.0
-certifi==2018.1.18
-cffi==1.13.0
-chardet==3.0.4
-cliff==2.11.0
-cmd2==0.8.1
-coverage==4.0
-cryptography==2.1
-debtcollector==1.19.0
-decorator==4.2.1
-deprecation==2.0
-doc8==0.6.0
-docker-pycreds==0.2.2
-docker==2.4.2
-docutils==0.14
-dogpile.cache==0.6.5
-dulwich==0.19.0
-extras==1.0.0
-fixtures==3.0.0
-gitdb2==2.0.3
-GitPython==2.1.8
-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==3.4.0
-linecache2==1.0.0
-MarkupSafe==1.1.0
-monotonic==1.4
-msgpack==0.5.6
-munch==2.2.0
-netaddr==0.7.18
-netifaces==0.10.6
-openstacksdk==0.12.0
-os-client-config==1.29.0
-os-service-types==1.2.0
-osc-lib==1.10.0
-oslo.config==5.2.0
-oslo.context==2.20.0
-oslo.i18n==3.20.0
-oslo.log==3.36.0
-oslo.serialization==2.25.0
-oslo.utils==3.33.0
-oslotest==3.2.0
-packaging==17.1
-pbr==2.0.0
-prettytable==0.7.1
-pycparser==2.18
-Pygments==2.2.0
-pyinotify==0.9.6
-pyOpenSSL==17.5.0
-pyparsing==2.2.0
-pyperclip==1.6.0
-python-dateutil==2.7.0
-python-mimeparse==1.6.0
-python-subunit==1.2.0
-pytz==2013.6
-PyYAML==3.12
-requests==2.18.4
-requestsexceptions==1.4.0
-restructuredtext-lint==1.1.3
-rfc3986==1.2.0
-simplejson==3.13.2
-smmap2==2.0.3
-snowballstemmer==1.2.1
-sphinxcontrib-svg2pdfconverter==0.1.0
-stevedore==1.28.0
-stestr==2.0.0
-testscenarios==0.4
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-urllib3==1.22
-warlock==1.3.0
-websocket-client==0.47.0
-wrapt==1.10.11

tox.ini

@@ -71,12 +71,6 @@ commands =
   rm -rf releasenotes/build
   sphinx-build -a -E -W -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html
 
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
-
 [testenv:linters]
 # Env vars and deps need to be defined in top level tox env
 setenv =

zuul.d/base.yaml

@@ -14,7 +14,6 @@
     irrelevant-files:
       - ^.*\.rst$
       - ^doc/.*
-      - ^lower-constraints.txt$
       - ^releasenotes/.*$
       - ^deploy-guide/.*$
       - ^test-requirements.txt$

zuul.d/project.yaml

@@ -3,7 +3,6 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-wallaby-jobs
       - ansible-role-jobs
       - publish-openstack-docs-pti