Remove ./docs and docs-related dependencies/tools

docs/create_toc.py

@@ -1,8 +0,0 @@
-import os
-from pathlib import Path
-
-# This script provides a platform-independent way of making the jupyter-book call (used in pyproject.toml)
-toc_file = Path(__file__).parent / "_toc.yml"
-cmd = f"jupyter-book toc from-project docs -e .rst -e .md -e .ipynb  >{toc_file}"
-print(cmd)
-os.system(cmd)