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: I710eec1feec922c6b5532dc754ab0fe3e90d3ff8

.zuul.yaml

@@ -2,7 +2,6 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-zed-jobs
       - release-notes-jobs-python3
     check:

lower-constraints.txt

@@ -1,62 +0,0 @@
-appdirs==1.4.0
-Babel==2.3.4
-bandit==1.4.0
-cassandra-driver==3.21.0
-coverage==4.0
-debtcollector==1.2.0
-docutils==0.11
-elasticsearch==2.0.0
-extras==1.0.0
-fixtures==3.0.0
-future==0.16.0
-gevent==1.2.2
-gitdb==0.6.4
-GitPython==1.0.1
-greenlet==0.4.10
-influxdb==2.9.2
-iso8601==0.1.11
-kazoo==2.8.0
-keystoneauth1==3.4.0
-linecache2==1.0.0
-mccabe==0.6.0
-monasca-common==2.16.0
-monotonic==0.6
-mox3==0.20.0
-msgpack-python==0.4.0
-netaddr==0.7.18
-netifaces==0.10.4
-openstackdocstheme==2.2.1
-os-client-config==1.28.0
-os-testr==1.0.0
-oslo.config==5.2.0
-oslo.context==2.19.2
-oslo.i18n==3.15.3
-oslo.log==3.36.0
-oslo.policy==1.30.0
-oslo.serialization==2.18.0
-oslo.utils==3.33.0
-oslotest==3.2.0
-pbr==2.0.0
-pyinotify==0.9.6
-PyMySQL==0.7.6
-pyparsing==2.1.0
-python-dateutil==2.5.3
-python-mimeparse==1.6.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.12
-reno==3.1.0
-requests==2.14.2
-requestsexceptions==1.2.0
-rfc3986==0.3.1
-simplejson==3.8.1
-smmap==0.9.0
-Sphinx==2.0.0
-stestr==1.0.0
-stevedore==1.20.0
-tabulate==0.8.1
-testrepository==0.0.18
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-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

@@ -102,14 +102,6 @@ def factory(register):
   M007 = checks:assert_raisesRegexp
 paths = ./monasca_persister/hacking
 
-[testenv:lower-constraints]
-basepython = python3
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  .[influxdb,cassandra,elasticsearch]
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
-
 [testenv:releasenotes]
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/doc/requirements.txt