Reverted and added build readme to old build.yml

Author: evaherrada

.github/workflows/build.yml

@@ -1,7 +1,3 @@
-# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
-
 name: Build CI
 
 on: [pull_request, push]
@@ -42,14 +38,14 @@ jobs:
       # (e.g. - apt-get: gettext, etc; pip: circuitpython-build-tools, requirements.txt; etc.)
       run: |
         source actions-ci/install.sh
-    - name: Pip install pylint, Sphinx, pre-commit
+    - name: Pip install pylint, black, & Sphinx
       run: |
-        pip install --force-reinstall pylint Sphinx sphinx-rtd-theme pre-commit
+        pip install --force-reinstall pylint black==19.10b0 Sphinx sphinx-rtd-theme
     - name: Library version
       run: git describe --dirty --always --tags
-    - name: Pre-commit hooks
+    - name: Check formatting
       run: |
-        pre-commit run --all-files
+        black --check --target-version=py35 .
     - name: PyLint
       run: |
         pylint $( find . -path './adafruit*.py' )