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: Ide6b3e9d6c1171f1ae568c256a3e9affa45de17b

lower-constraints.txt

@@ -1,61 +0,0 @@
-alembic==1.4.2
-automaton==1.9.0
-Babel==2.6.0
-bandit==1.1.0
-cliff==3.3.0
-coverage==4.0
-ddt==1.2.1
-dogpile.cache==0.9.2
-eventlet==0.18.2
-fixtures==3.0.0
-futurist==1.2.0
-ironic-lib==4.6.1
-iso8601==0.1.11
-Jinja2==3.0.0
-jsonpatch==1.16
-jsonschema==3.2.0
-keystoneauth1==4.2.0
-keystonemiddleware==4.17.0
-openstacksdk==0.48.0
-oslo.concurrency==4.2.0
-oslo.config==6.8.0
-oslo.context==2.22.0
-oslo.db==9.1.0
-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.rootwrap==5.8.0
-oslo.serialization==2.25.0
-oslo.service==1.24.0
-oslotest==3.2.0
-oslo.upgradecheck==1.3.0
-oslo.utils==4.5.0
-oslo.versionedobjects==1.31.2
-osprofiler==1.5.0
-os-traits==0.4.0
-pbr==3.1.1
-pecan==1.0.0
-psutil==3.2.2
-psycopg2==2.8.5
-pycdlib==1.11.0
-PyMySQL==0.8.0
-pysnmp==4.4.12
-python-cinderclient==3.3.0
-python-glanceclient==2.8.0
-python-swiftclient==3.2.0
-pytz==2013.6
-requests==2.18.0
-rfc3986==1.2.0
-SQLAlchemy==1.2.19
-stestr==2.0.0
-stevedore==1.29.0
-sushy==3.10.0
-tenacity==6.2.0
-testtools==2.2.0
-tooz==2.7.0
-virtualbmc==1.4.0
-WebOb==1.7.1
-WebTest==2.0.27

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

@@ -154,9 +154,3 @@ paths = ./ironic/hacking/
 usedevelop = False
 deps = -r{toxinidir}/test-requirements.txt
 commands = bandit -r ironic -x tests -n5 -ll -c tools/bandit.yml
-
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt

zuul.d/project.yaml

@@ -2,7 +2,6 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
-      - openstack-lower-constraints-master-branch-jobs
       - openstack-python3-zed-jobs
       - openstack-python3-zed-jobs-arm64
       - periodic-stable-jobs