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: I429e40d21c075de3b8666dc60c878378acfba5e1

.zuul.yaml

@@ -2,7 +2,6 @@
     templates:
       - check-requirements
       - horizon-non-primary-django-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-yoga-jobs
 
     check:

lower-constraints.txt

@@ -1,52 +0,0 @@
-alabaster==0.7.10
-Babel==2.5.3
-certifi==2018.1.18
-chardet==3.0.4
-cliff==2.11.0
-cmd2==0.8.1
-colorama==0.3.9
-coverage==4.0
-debtcollector==1.19.0
-Django==2.2
-django-appconf==1.0.2
-django-compressor==2.0
-docutils==0.14
-extras==1.0.0
-fixtures==3.0.0
-horizon==17.1.0
-idna==2.6
-imagesize==1.0.0
-iso8601==0.1.12
-Jinja2==2.10
-keystoneauth1==3.18.0
-linecache2==1.0.0
-logilab-common==1.4.1
-MarkupSafe==1.0
-netaddr==0.7.19
-oslo.config==5.2.0
-oslo.i18n==3.20.0
-oslo.log==3.36.0
-pbr==3.1.1
-prettytable==0.7.2
-Pygments==2.2.0
-pyparsing==2.2.0
-pyperclip==1.6.0
-python-freezerclient==2.0.0
-python-mimeparse==1.6.0
-python-subunit==1.2.0
-pytz==2018.3
-PyYAML==3.12
-rcssmin==1.0.6
-requests==2.18.4
-rfc3986==1.1.0
-rjsmin==1.0.12
-snowballstemmer==1.2.1
-Sphinx==2.0.0
-sphinxcontrib-websupport==1.0.1
-stevedore==1.28.0
-termcolor==1.1.0
-testrepository==0.0.18
-testtools==2.2.0
-traceback2==1.4.0
-urllib3==1.22
-wrapt==1.11

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

@@ -50,9 +50,3 @@ exclude = .venv,.git,.tox,dist,*lib/python*,*egg,build,panel_template,dash_templ
 max-complexity = 20
 ignore = H404,H403,H401,H238,H306,H701,W504
 #H405
-
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt