Removing pytest-xdist -n auto

Author: moderouin

tox.ini

@@ -25,15 +25,14 @@ deps =
     pytest-cov
     pytest-randomly
     pytest-sugar
-    pytest-xdist
     isort
     black
     numpy==1.26.4
     torch==2.6.0
     mypy
     types-setuptools
 commands =
-    python -m pytest --cov-report term-missing --cov=axelrod --cov-fail-under=100 . -n auto --doctest-glob="*.md" --doctest-glob="*.rst"
+    python -m pytest --cov-report term-missing --cov=axelrod --cov-fail-under=100 . --doctest-glob="*.md" --doctest-glob="*.rst"
     python -m black -l 80 . --check
     python -m isort --check-only axelrod/.
     python run_mypy.py