get rid of poetry run. It is probably not needed

tox.ini

@@ -20,7 +20,7 @@ setenv =
 [testenv:py{39,310,311,312}]
 commands_pre = poetry install --only main --only testenv --sync
 commands =
-    poetry run pytest \
+    pytest \
         --basetemp={envtmpdir} \
         black_it tests/ \
         --cov=black_it \
@@ -74,15 +74,15 @@ commands = make darglint
 # From Poetry FAQ "Is tox supported?" (https://python-poetry.org/docs/faq/#use-case-2)
 commands_pre = poetry install --only main --only docs --sync
 commands =
-    poetry run mkdocs build --clean
+    mkdocs build --clean
 
 [testenv:docs-serve]
 # From Poetry FAQ "Is tox supported?" (https://python-poetry.org/docs/faq/#use-case-2)
 commands_pre = poetry install --only main --only docs --sync
 commands =
-    poetry run mkdocs build --clean
+    mkdocs build --clean
     python -c 'print("###### Starting local server. Press Control+C to stop server ######")'
-    poetry run mkdocs serve
+    mkdocs serve
 
 [testenv:check-copyright]
 deps =