Remove Colab links in notebooks. Remove old environment.yml file. #57

	name: check-book

	on: pull_request

	jobs:
	check-book:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true

	- name: Set up Python
	uses: actions/setup-python@v1
	with:
	python-version: 3.8

	- name: Install dependencies
	run: \|
	pip install -r requirements-deploy.txt

	- name: Build the book
	run: \|
	jupyter-book build docs

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