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: I775420251d6e47f60c4a266b4013be84a52378da

.zuul.yaml

@@ -119,7 +119,6 @@
 
 - project:
     templates:
-      - openstack-lower-constraints-jobs
       - check-requirements
       - openstack-cover-jobs
       - openstack-python3-zed-jobs

lower-constraints.txt

@@ -1,53 +0,0 @@
-# requirements
-pbr==5.5.1 # Apache-2.0
-alembic==1.4.3 # MIT
-keystonemiddleware==9.1.0 # Apache-2.0
-gnocchiclient==7.0.6 # Apache-2.0
-python-monascaclient==2.2.1 # Apache-2.0
-python-keystoneclient==4.1.1 # Apache-2.0
-keystoneauth1==4.2.1 # Apache-2.0
-iso8601==0.1.13 # MIT
-PasteDeploy==2.1.1 # MIT
-pecan==1.3.3 # BSD
-WSME==0.10.0 # MIT
-oslo.config==8.3.3 # Apache-2.0
-oslo.context==3.1.1 # Apache-2.0
-oslo.concurrency==4.3.1 # Apache-2.0
-oslo.db==8.4.0 # Apache-2.0
-oslo.i18n==5.0.1 # Apache-2.0
-oslo.log==4.4.0 # Apache-2.0
-oslo.messaging==12.6.0 # Apache-2.0
-oslo.middleware==4.1.1 # Apache-2.0
-oslo.policy==3.6.0 # Apache-2.0
-oslo.utils==4.7.0 # Apache-2.0
-oslo.upgradecheck==1.3.0 # Apache-2.0
-python-dateutil==2.8.0 # BSD
-SQLAlchemy==1.3.20 # MIT
-stevedore==3.2.2 # Apache-2.0
-tooz==2.7.1 # Apache-2.0
-voluptuous==0.12.0 # BSD-3
-influxdb==5.3.1 # MIT
-Flask==2.0.0 # BSD
-Flask-RESTful==0.3.9 # BSD
-cotyledon==1.7.3 # Apache-2.0
-futurist==2.3.0 # Apache-2.0
-bandit>=1.6.0 # Apache-2.0
-datetimerange==0.6.1 # MIT
-
-# test-requirements
-coverage==5.3 # Apache-2.0
-kombu==5.0.2 # BSD
-ddt==1.4.1 # MIT
-gabbi==2.0.4 # Apache-2.0
-testscenarios==0.5.0 # Apache-2.0/BSD
-stestr==3.0.1 # Apache-2.0
-sphinx==3.3.1 # BSD
-openstackdocstheme==2.2.6
-oslotest==4.4.1 # Apache-2.0
-sphinxcontrib-pecanwsme==0.10.0 # Apache-2.0
-reno==3.2.0
-sphinxcontrib-httpdomain==1.7.0 # Apache-2.0
-doc8==0.8.1 # Apache-2.0
-Pygments==2.7.2 # BSD
-os-api-ref==2.1.0 # Apache-2.0
-

requirements.txt

@@ -1,6 +1,11 @@
+# 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.
+
 pbr>=5.5.1 # Apache-2.0
 alembic>=1.4.3 # MIT
 keystonemiddleware>=9.1.0 # Apache-2.0

tox.ini

@@ -96,9 +96,3 @@ paths = ./cloudkitty/hacking
 [testenv:releasenotes]
 deps = {[testenv:docs]deps}
 commands = 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