Remove lower constraints.

Remove the lower constraints file and the
tox environment for lower constraints.

Change-Id: Iefa00bee6f67e9e82f0c703a7aff144c0dcbe1ec

lower-constraints.txt

@@ -1,82 +0,0 @@
-alabaster==0.7.10
-amqp==2.5.2
-appdirs==1.3.0
-Babel==2.3.4
-bandit==1.1.0
-cachetools==2.0.0
-cffi==1.14.0
-cliff==2.8.0
-cmd2==0.8.0
-confluent-kafka==1.3.0
-contextlib2==0.4.0
-coverage==4.0
-debtcollector==1.2.0
-docutils==0.11
-dulwich==0.15.0
-eventlet==0.23.0
-extras==1.0.0
-fasteners==0.7.0
-fixtures==3.0.0
-futurist==1.2.0
-gitdb==0.6.4
-GitPython==1.0.1
-greenlet==0.4.15
-imagesize==0.7.1
-iso8601==0.1.11
-Jinja2==2.10
-keystoneauth1==3.4.0
-kombu==4.6.6
-linecache2==1.0.0
-MarkupSafe==1.1.1
-mock==2.0.0
-mox3==0.20.0
-msgpack-python==0.4.0
-netaddr==0.8.0
-netifaces==0.10.4
-os-client-config==1.28.0
-oslo.concurrency==3.25.0
-oslo.config==5.2.0
-oslo.context==2.19.2
-oslo.i18n==3.15.3
-oslo.log==3.36.0
-oslo.middleware==3.31.0
-oslo.serialization==2.18.0
-oslo.service==1.24.0
-oslo.utils==3.37.0
-oslotest==3.2.0
-Paste==2.0.2
-PasteDeploy==1.5.0
-pbr==2.0.0
-pifpaf==2.2.0
-prettytable==0.7.2
-pycparser==2.18
-Pygments==2.2.0
-pyinotify==0.9.6
-pyngus==2.2.0
-pyparsing==2.1.0
-pyperclip==1.5.27
-python-dateutil==2.5.3
-python-mimeparse==1.6.0
-python-qpid-proton==0.20.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.13
-repoze.lru==0.7
-requests==2.14.2
-requestsexceptions==1.2.0
-rfc3986==0.3.1
-Routes==2.3.1
-smmap==0.9.0
-snowballstemmer==1.2.1
-statsd==3.2.1
-stestr==2.0.0
-stevedore==1.20.0
-tenacity==4.4.0
-testscenarios==0.4
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-vine==1.1.4
-WebOb==1.7.1
-wrapt==1.7.0
-xattr==0.9.2

tox.ini

@@ -114,9 +114,3 @@ deps = -r{toxinidir}/doc/requirements.txt
 [testenv:bindep]
 deps = bindep
 commands = bindep {posargs}
-
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt