Use poetry directly in lints

tox.ini

@@ -30,17 +30,3 @@ filterwarnings =
     default::DeprecationWarning
     error:.*:Warning:pelican
 addopts = -n auto -r a
-
-[flake8]
-application-import-names = pelican
-import-order-style = cryptography
-max-line-length = 88
-
-[testenv:flake8]
-basepython = python3.9
-skip_install = true
-deps =
-    -rrequirements/style.pip
-commands =
-    flake8 --version
-    flake8 pelican