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: Ibd8664001aa3960f3994340cfd31683d8514a280

.zuul.yaml

@@ -199,7 +199,6 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-zed-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3

lower-constraints.txt

@@ -1,118 +0,0 @@
-alabaster==0.7.10
-alembic==0.9.6
-appdirs==1.4.0
-asn1crypto==0.23.0
-Babel==2.3.4
-bandit==1.4.0
-bashate==0.5.1
-cassandra-driver==3.3.0
-cffi==1.14.0
-chardet==3.0.4
-cliff==2.8.0
-cmd2==0.8.0
-coverage==4.0
-cryptography==2.7
-debtcollector==1.2.0
-decorator==4.1.0
-doc8==0.6.0
-docutils==0.12
-dulwich==0.15.0
-eventlet==0.18.2
-extras==1.0.0
-falcon==2.0.0
-fasteners==0.7.0
-fixtures==3.0.0
-funcsigs==1.0.0
-future==0.16.0
-futures==3.0.0
-gevent==1.2.2
-gitdb==0.6.4
-GitPython==1.0.1
-greenlet==0.4.15
-httplib2==0.9.1
-idna==2.6
-imagesize==0.7.1
-influxdb==2.9.2
-iso8601==0.1.11
-Jinja2==2.10
-jsonschema==2.6.0
-kazoo==2.8.0
-keystoneauth1==3.4.0
-keystonemiddleware==4.17.0
-linecache2==1.0.0
-Mako==1.0.7
-MarkupSafe==1.1.1
-mccabe==0.6.0
-monasca-common==2.16.0
-monotonic==0.6
-mox3==0.20.0
-msgpack-python==0.4.0
-netaddr==0.7.20
-netifaces==0.10.4
-openstackdocstheme==2.2.1
-os-api-ref==1.4.0
-os-client-config==1.28.0
-os-testr==1.0.0
-oslo.concurrency==3.25.0
-oslo.config==6.8.0
-oslo.context==2.22.0
-oslo.db==6.0.0
-oslo.i18n==3.15.3
-oslo.log==3.36.0
-oslo.middleware==3.31.0
-oslo.policy==3.6.0
-oslo.serialization==2.18.0
-oslo.utils==4.5.0
-oslo.upgradecheck==1.3.0 # Apache-2.0
-oslotest==3.2.0
-paramiko==2.0.0
-PasteDeploy==1.5.0
-Paste==2.0.2
-pbr==2.0.0
-positional==1.2.1
-prettytable==0.7.2
-pyasn1==0.1.8
-pycadf==1.1.0
-pycparser==2.18
-Pygments==2.2.0
-pyinotify==0.9.6
-PyMySQL==0.8.0
-pyparsing==3.0.6
-pyperclip==1.5.27
-python-dateutil==2.5.3
-python-editor==1.0.3
-python-keystoneclient==3.8.0
-python-mimeparse==1.6.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==5.1
-reno==3.1.0
-requests==2.20.0
-requestsexceptions==1.2.0
-requests-mock==1.2.0
-restructuredtext-lint==1.1.1
-rfc3986==1.2.0
-simplejson==3.8.1
-six==1.12.0
-smmap==0.9.0
-snowballstemmer==1.2.1
-Sphinx==2.0.0
-sphinxcontrib-websupport==1.0.1
-SQLAlchemy==1.3.0
-sqlalchemy-migrate==0.13.0
-sqlparse==0.2.2
-statsd==3.2.1
-stestr==1.0.0
-stevedore==1.20.0
-tabulate==0.8.1
-tempest==17.1.0
-Tempita==0.5.2
-testrepository==0.0.18
-testscenarios==0.4
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-urllib3==1.21.1
-voluptuous==0.11.1
-WebOb==1.7.1
-wrapt==1.7.0

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

@@ -175,10 +175,3 @@ import_exceptions =
 extension =
   B319 = checks:no_xrange
 paths = ./monasca_api/hacking
-
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
-  .[influxdb,cassandra]