remove some dependencies

Author: alisonpeisker

.github/workflows/deploy-docs.yml

@@ -28,7 +28,6 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install sphinx sphinx_copybutton sphinx-book-theme
-          pip install -e .
       - name: Clean old docs
         run: rm -rf docs/_build
       - name: Build Sphinx documentation