Clean up some py36 infra

- Drop py36 versions from py3-constraints.txt
- Remove py36 tox environment

Forgot to do this when we dropped py36 support.

Signed-off-by: Tim Burke <tim.burke@gmail.com>
Change-Id: I0233e1dd036b9a420c815fec3c9632d2967b934e

py3-constraints.txt

@@ -1,117 +1,88 @@
 GitPython===3.1.45;python_version>='3.7'
-GitPython===3.1.18;python_version=='3.6'
 PasteDeploy===3.1.0;python_version>='3.7'
-PasteDeploy===2.1.1;python_version=='3.6'
 PyJWT===2.10.1;python_version>='3.9'
 PyJWT===2.9.0;python_version=='3.8'
 # PyJWT only required for keystonemiddleware>10, which requires python>=3.8
 PyYAML===6.0.2;python_version>='3.8'
 PyYAML===6.0.1;python_version=='3.7'
-PyYAML===6.0.1;python_version=='3.6'
 Pygments===2.19.2;python_version>='3.8'
 Pygments===2.17.2;python_version=='3.7'
 WebOb===1.8.9
 attrs===25.3.0;python_version>='3.8'
 attrs===24.2.0;python_version=='3.7'
-attrs===22.2.0;python_version=='3.6'
 autopage===0.5.2
 bandit===1.8.6;python_version>='3.9'
 bandit===1.7.10;python_version=='3.8'
 bandit===1.7.5;python_version=='3.7'
-bandit===1.7.1;python_version=='3.6'
 boto3===1.40.19;python_version>='3.9'
 boto3===1.37.38;python_version=='3.8'
 boto3===1.33.13;python_version=='3.7'
-boto3===1.23.10;python_version=='3.6'
 botocore===1.40.19;python_version>='3.9'
 botocore===1.37.38;python_version=='3.8'
 botocore===1.33.13;python_version=='3.7'
-botocore===1.26.10;python_version=='3.6'
 certifi===2025.8.3
 cffi===1.17.1;python_version>='3.8'
 cffi===1.15.1;python_version=='3.7'
-cffi===1.15.1;python_version=='3.6'
 charset-normalizer===3.4.3;python_version>='3.7'
-charset-normalizer===2.0.12;python_version=='3.6'
 cliff===4.11.0;python_version>='3.10'
 cliff===4.9.1;python_version=='3.9'
 cliff===4.7.0;python_version=='3.8'
 cliff===3.10.1;python_version=='3.7'
-cliff===3.10.1;python_version=='3.6'
 cmd2===2.7.0;python_version>='3.9'
 cmd2===2.5.11;python_version=='3.8'
 cmd2===2.4.3;python_version=='3.7'
-cmd2===2.4.3;python_version=='3.6'
 coverage===7.10.5;python_version>='3.9'
 coverage===7.6.1;python_version=='3.8'
 coverage===7.2.7;python_version=='3.7'
-coverage===6.2;python_version=='3.6'
 cryptography===45.0.6;python_version>='3.7'
-cryptography===40.0.2;python_version=='3.6'
 debtcollector===3.0.0;python_version>='3.8'
 debtcollector===2.5.0;python_version=='3.7'
-debtcollector===2.5.0;python_version=='3.6'
 decorator===5.2.1;python_version>='3.8'
 decorator===5.1.1;python_version=='3.7'
 dnspython===2.7.0;python_version>='3.9'
 dnspython===2.6.1;python_version=='3.8'
 dnspython===2.3.0;python_version=='3.7'
-dnspython===2.2.1;python_version=='3.6'
 docutils===0.22;python_version>='3.9'
 docutils===0.20.1;python_version=='3.8'
 docutils===0.20.1;python_version=='3.7'
-docutils===0.18.1;python_version=='3.6'
 dogpile.cache===1.4.0;python_version>='3.9'
 dogpile.cache===1.3.4;python_version=='3.8'
 dogpile.cache===1.2.2;python_version=='3.7'
-dogpile.cache===1.2.2;python_version=='3.6'
 eventlet===0.40.3;python_version>='3.9'
 eventlet===0.39.1;python_version=='3.8'
 eventlet===0.38.2;python_version=='3.7'
-eventlet===0.33.3;python_version=='3.6'
 exceptiongroup===1.3.0;python_version>='3.7'
 extras===1.0.0
 fixtures===4.2.6;python_version>='3.9'
 fixtures===4.2.5;python_version=='3.8'
 fixtures===4.1.0;python_version=='3.7'
-fixtures===4.0.1;python_version=='3.6'
 flake8===7.1.2;python_version>='3.8'
 flake8===3.8.4;python_version=='3.7'
-flake8===3.8.4;python_version=='3.6'
 gitdb===4.0.12;python_version>='3.7'
-gitdb===4.0.9;python_version=='3.6'
 greenlet===3.2.4;python_version>='3.9'
 greenlet===3.1.1;python_version=='3.8'
 greenlet===3.1.1;python_version=='3.7'
-greenlet===2.0.2;python_version=='3.6'
 hacking===7.0.0;python_version>='3.8'
 hacking===4.1.0;python_version=='3.7'
-hacking===4.1.0;python_version=='3.6'
 idna===3.10
 importlib-metadata===8.7.0;python_version>='3.9'
 importlib-metadata===8.5.0;python_version=='3.8'
 importlib-metadata===6.7.0;python_version=='3.7'
-importlib-metadata===4.8.3;python_version=='3.6'
 importlib-resources===6.5.2;python_version>='3.9'
 importlib-resources===6.4.5;python_version=='3.8'
 importlib-resources===5.12.0;python_version=='3.7'
 iniconfig===2.1.0;python_version>='3.8'
 iniconfig===2.0.0;python_version=='3.7'
-iniconfig===1.1.1;python_version=='3.6'
 iso8601===2.1.0;python_version>='3.7'
-iso8601===1.1.0;python_version=='3.6'
 jmespath===1.0.1;python_version>='3.7'
-jmespath===0.10.0;python_version=='3.6'
 keystoneauth1===5.12.0;python_version>='3.10'
 keystoneauth1===5.11.1;python_version=='3.9'
 keystoneauth1===5.8.1;python_version=='3.8'
 keystoneauth1===5.1.3;python_version=='3.7'
-keystoneauth1===5.1.3;python_version=='3.6'
 keystonemiddleware===10.12.0;python_version>='3.10'
 keystonemiddleware===10.11.0;python_version=='3.9'
 keystonemiddleware===10.7.1;python_version=='3.8'
 keystonemiddleware===9.5.0;python_version=='3.7'
-keystonemiddleware===9.5.0;python_version=='3.6'
 lxml===6.0.1;python_version>='3.8'
 lxml===5.4.0;python_version=='3.7'
 markdown-it-py===4.0.0;python_version>='3.10'
@@ -120,14 +91,11 @@ markdown-it-py===3.0.0;python_version=='3.8'
 markdown-it-py===2.2.0;python_version=='3.7'
 mccabe===0.7.0;python_version>='3.8'
 mccabe===0.6.1;python_version=='3.7'
-mccabe===0.6.1;python_version=='3.6'
 mdurl===0.1.2;python_version>='3.7'
 mock===5.2.0
 msgpack===1.1.1;python_version>='3.8'
 msgpack===1.0.5;python_version=='3.7'
-msgpack===1.0.5;python_version=='3.6'
 netaddr===1.3.0;python_version>='3.7'
-netaddr===0.10.1;python_version=='3.6'
 netifaces===0.11.0
 os-service-types===1.8.0;python_version>='3.10'
 os-service-types===1.7.0;python_version=='3.9'
@@ -136,135 +104,102 @@ os-service-types===1.7.0;python_version=='3.7'
 oslo.cache===3.12.0;python_version>='3.9'
 oslo.cache===3.8.0;python_version=='3.8'
 oslo.cache===2.11.0;python_version=='3.7'
-oslo.cache===2.11.0;python_version=='3.6'
 oslo.config===10.0.0;python_version>='3.9'
 oslo.config===9.6.0;python_version=='3.8'
 oslo.config===8.8.1;python_version=='3.7'
-oslo.config===8.8.1;python_version=='3.6'
 oslo.context===6.1.0;python_version>='3.9'
 oslo.context===5.6.0;python_version=='3.8'
 oslo.context===4.1.0;python_version=='3.7'
-oslo.context===4.1.0;python_version=='3.6'
 oslo.i18n===6.6.0;python_version>='3.9'
 oslo.i18n===6.4.0;python_version=='3.8'
 oslo.i18n===5.1.0;python_version=='3.7'
-oslo.i18n===5.1.0;python_version=='3.6'
 oslo.log===7.2.1;python_version>='3.9'
 oslo.log===6.1.2;python_version=='3.8'
 oslo.log===4.8.0;python_version=='3.7'
-oslo.log===4.8.0;python_version=='3.6'
 oslo.serialization===5.8.0;python_version>='3.9'
 oslo.serialization===5.5.0;python_version=='3.8'
 oslo.serialization===4.3.0;python_version=='3.7'
-oslo.serialization===4.3.0;python_version=='3.6'
 oslo.utils===9.1.0;python_version>='3.9'
 oslo.utils===7.3.0;python_version=='3.8'
 oslo.utils===4.13.0;python_version=='3.7'
-oslo.utils===4.13.0;python_version=='3.6'
 packaging===25.0;python_version>='3.8'
 packaging===24.0;python_version=='3.7'
-packaging===21.3;python_version=='3.6'
 pbr===7.0.1
 pluggy===1.6.0;python_version>='3.9'
 pluggy===1.5.0;python_version=='3.8'
 pluggy===1.2.0;python_version=='3.7'
-pluggy===1.0.0;python_version=='3.6'
 prettytable===3.16.0;python_version>='3.9'
 prettytable===3.11.0;python_version=='3.8'
 prettytable===3.7.0;python_version=='3.7'
-prettytable===2.5.0;python_version=='3.6'
 py===1.11.0
 pycadf===4.0.1;python_version>='3.9'
 pycadf===4.0.0;python_version=='3.8'
 pycadf===3.1.1;python_version=='3.7'
-pycadf===3.1.1;python_version=='3.6'
 pycodestyle===2.12.1;python_version>='3.8'
 pycodestyle===2.6.0;python_version=='3.7'
-pycodestyle===2.6.0;python_version=='3.6'
 pycparser===2.22;python_version>='3.8'
 pycparser===2.21;python_version=='3.7'
-pycparser===2.21;python_version=='3.6'
 pyeclib===1.6.4
 pyflakes===3.2.0;python_version>='3.8'
 pyflakes===2.2.0;python_version=='3.7'
-pyflakes===2.2.0;python_version=='3.6'
 pyinotify===0.9.6
 pyparsing===3.2.3;python_version>='3.9'
 pyparsing===3.1.4;python_version=='3.8'
 pyparsing===3.1.4;python_version=='3.7'
-pyparsing===3.1.4;python_version=='3.6'
 pyperclip===1.9.0
 pytest===8.4.1;python_version>='3.9'
 pytest===8.3.5;python_version=='3.8'
 pytest===7.4.4;python_version=='3.7'
-pytest===7.0.1;python_version=='3.6'
 pytest-cov===6.2.1;python_version>='3.9'
 pytest-cov===5.0.0;python_version=='3.8'
 pytest-cov===4.1.0;python_version=='3.7'
-pytest-cov===4.0.0;python_version=='3.6'
 python-dateutil===2.9.0.post0
 python-keystoneclient===5.7.0;python_version>='3.10'
 python-keystoneclient===5.6.0;python_version=='3.9'
 python-keystoneclient===5.5.0;python_version=='3.8'
 python-keystoneclient===4.5.0;python_version=='3.7'
-python-keystoneclient===4.5.0;python_version=='3.6'
 python-subunit===1.4.4;python_version>='3.7'
-python-subunit===1.4.2;python_version=='3.6'
 python-swiftclient===4.8.0
 pytz===2025.2
 requests===2.32.5;python_version>='3.9'
 requests===2.32.4;python_version=='3.8'
 requests===2.31.0;python_version=='3.7'
-requests===2.27.1;python_version=='3.6'
 requests-mock===1.12.1
 rfc3986===2.0.0;python_version>='3.7'
-rfc3986===1.5.0;python_version=='3.6'
 rich===14.1.0;python_version>='3.8'
 rich===13.8.1;python_version=='3.7'
 s3transfer===0.13.1;python_version>='3.9'
 s3transfer===0.11.5;python_version=='3.8'
 s3transfer===0.8.2;python_version=='3.7'
-s3transfer===0.5.2;python_version=='3.6'
 setuptools===75.3.0;python_version>='3.12'
 smmap===5.0.2;python_version>='3.7'
-smmap===5.0.0;python_version=='3.6'
 stestr===4.2.0;python_version>='3.8'
 stestr===4.1.0;python_version=='3.7'
 stevedore===5.5.0;python_version>='3.9'
 stevedore===5.3.0;python_version=='3.8'
 stevedore===3.5.2;python_version=='3.7'
-stevedore===3.5.2;python_version=='3.6'
 testtools===2.7.2;python_version>='3.8'
 testtools===2.7.1;python_version=='3.7'
-testtools===2.6.0;python_version=='3.6'
 tomli===2.2.1;python_version>='3.8'
 tomli===2.0.1;python_version=='3.7'
-tomli===1.2.3;python_version=='3.6'
 tomlkit===0.13.3;python_version>='3.8'
 tomlkit===0.12.5;python_version=='3.7'
-tomlkit===0.11.6;python_version=='3.6'
 typing_extensions===4.15.0;python_version>='3.9'
 typing_extensions===4.13.2;python_version=='3.8'
 typing_extensions===4.7.1;python_version=='3.7'
-typing_extensions===4.1.1;python_version=='3.6'
 tzdata===2025.2;python_version>='3.9'
 urllib3===2.5.0;python_version>='3.10'
 urllib3===1.26.20;python_version=='3.9'
 urllib3===1.26.20;python_version=='3.8'
 urllib3===1.26.20;python_version=='3.7'
-urllib3===1.26.20;python_version=='3.6'
 voluptuous===0.15.2;python_version>='3.9'
 voluptuous===0.14.2;python_version=='3.8'
 voluptuous===0.14.1;python_version=='3.7'
-voluptuous===0.13.1;python_version=='3.6'
 wcwidth===0.2.13
 wrapt===1.17.3;python_version>='3.8'
 wrapt===1.16.0;python_version=='3.7'
-wrapt===1.16.0;python_version=='3.6'
 xattr===1.2.0;python_version>='3.8'
 xattr===0.10.1;python_version=='3.7'
-xattr===0.10.1;python_version=='3.6'
 zipp===3.23.0;python_version>='3.9'
 zipp===3.20.2;python_version=='3.8'
 zipp===3.15.0;python_version=='3.7'
-zipp===3.6.0;python_version=='3.6'

tox.ini

@@ -1,9 +1,6 @@
 [tox]
 envlist = py3,pep8
 minversion = 3.18.0
-requires =
-  # required to support py27/py36 envs
-  virtualenv<20.22
 
 [pytest]
 addopts = --verbose -p no:requests_mock -r a
@@ -28,7 +25,7 @@ passenv = SWIFT_*
 
 [testenv:s3api]
 usedevelop = False
-deps = {[testenv:py36]deps}
+deps = {[testenv:py37]deps}
 commands =
   pytest {posargs:test/s3api}
 # For some reason we hit some EPERM issue when building the package for these tests?
@@ -36,20 +33,17 @@ commands =
 skipsdist = True
 skip_install = True
 
-[testenv:py36]
+[testenv:py37]
 deps =
   -c{toxinidir}/py3-constraints.txt
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
 
-[testenv:py37]
-deps = {[testenv:py36]deps}
-
 [testenv:py38]
-deps = {[testenv:py36]deps}
+deps = {[testenv:py37]deps}
 
 [testenv:py39]
-deps = {[testenv:py36]deps}
+deps = {[testenv:py37]deps}
 
 [testenv:cover]
 setenv = VIRTUAL_ENV={envdir}
@@ -64,13 +58,13 @@ commands =
   ./.manpages {posargs}
 
 [testenv:func]
-deps = {[testenv:py36]deps}
+deps = {[testenv:py37]deps}
 allowlist_externals =
   ./.functests
 commands = ./.functests {posargs}
 
 [testenv:func-ec]
-deps = {[testenv:py36]deps}
+deps = {[testenv:py37]deps}
 allowlist_externals =
   ./.functests
 commands = ./.functests {posargs}
@@ -78,7 +72,7 @@ setenv = SWIFT_TEST_IN_PROCESS=1
          SWIFT_TEST_IN_PROCESS_CONF_LOADER=ec
 
 [testenv:func-encryption]
-deps = {[testenv:py36]deps}
+deps = {[testenv:py37]deps}
 allowlist_externals =
   ./.functests
 commands = ./.functests {posargs}