Removes unnecessary `external_context.py`, clean Makefile & update de… #1

	name: Auto-deployment of Documentation
	on:
	push:
	branches: [ master ]
	jobs:
	build-docs:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3.0.2
	with:
	fetch-depth: 0 # otherwise, you will failed to push refs to dest repo

	- name: Set up Python 3.
	uses: actions/setup-python@v3
	with:
	python-version: 3.9

	- name: Install Poetry.
	run: pip install poetry==1.3.2

	- name: Install dependencies.
	run: \|
	poetry install --with docs

	- name: Build documentation.
	run: \|
	echo ${{ secrets.GH_TOKEN }} >> src/sssom/token.txt
	mkdir gh-pages
	touch gh-pages/.nojekyll
	cd docs/
	poetry run sphinx-apidoc -o . ../src/sssom/ --ext-autodoc -f
	poetry run sphinx-build -b html . _build
	cp -r _build/* ../gh-pages/

	- name: Deploy documentation.
	if: ${{ github.event_name == 'push' }}
	uses: JamesIves/github-pages-deploy-action@v4.4.1
	with:
	branch: gh-pages
	force: true
	folder: gh-pages
	token: ${{ secrets.GH_TOKEN }}

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