Disable flake8, pydocstyle and pylint in VS Code settings

The equivalent checks are now performed via Ruff and configured in
pyproject.toml as Ruff checks.

Installing the Ruff extension to VS Code enables their execution
also within VS Code.

.vscode/settings.json

@@ -11,11 +11,10 @@
   ],
   "python.formatting.provider": "black",
   "python.linting.enabled": true,
-  "python.linting.flake8Enabled": true,
-  "python.linting.flake8Path": ".venv/bin/pflake8",
+  "python.linting.flake8Enabled": false,
   "python.linting.mypyEnabled": true,
-  "python.linting.pydocstyleEnabled": true,
-  "python.linting.pylintEnabled": true,
+  "python.linting.pydocstyleEnabled": false,
+  "python.linting.pylintEnabled": false,
   "python.testing.pytestArgs": [
     "-vv",
     "-nauto",