simplify tox config

Author: cognifloyd

tox.ini

@@ -1,24 +1,21 @@
 [tox]
-envlist = py36,py38,py39,py310,py311,lint
+envlist = py38,py39,py310,py311,lint
 
 [testenv]
 deps = -r{toxinidir}/test-requirements.txt
+commands = pytest
 
 [testenv:py38]
 basepython = python3.8
-commands = pytest
 
 [testenv:py39]
 basepython = python3.9
-commands = pytest
 
 [testenv:py310]
 basepython = python3.10
-commands = pytest
 
 [testenv:py311]
 basepython = python3.11
-commands = pytest
 
 [testenv:lint]
 commands = flake8 --config ./lint-configs/python/.flake8 st2auth_flat_file_backend/