Revert "Try pytest-xdist" (#422)

Reverts #415

Author: paddyroddy

.github/workflows/examples.yaml

@@ -35,11 +35,10 @@ jobs:
           key: readme-${{ hashFiles('pyproject.toml') }}
 
       - name: Install dependencies
-        run: python -m pip install -e ".[readme]"
+        run: python -m pip install -e '.[readme]'
 
       - name: Run examples in the README
-        run: >-
-          python -m pytest --codeblocks .github README.md documentation -n auto
+        run: python -m pytest --codeblocks .github README.md documentation
 
   examples:
     runs-on: ubuntu-latest

pyproject.toml

@@ -67,7 +67,6 @@ optional-dependencies = {dev = [
     "pdoc3",
 ], readme = [
     "pytest-codeblocks",
-    "pytest-xdist",
 ]}
 readme = "README.md"
 requires-python = ">=3.11"