Duplicate pip install

[tekktrik]

Looks like this workflow duplicates the pip install steps completed by actions-ci/install.sh:

workflows-circuitpython-libs/build/action.yml

Lines 68 to 72 in a9417d1

	- name: Install dependencies
	shell: bash
	run: |
	pip install -r requirements.txt
	pip install -r optional_requirements.txt

https://github.com/adafruit/actions-ci-circuitpython-libs/blob/820e76313197a5721a966d7bd3cfc70ad8156a61/install.sh#L23-L26