Update deploy.yaml

Author: hamelsmu

.github/workflows/deploy.yaml

@@ -21,7 +21,6 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install git+https://github.com/fastai/nbprocess.git
-          pip install -qe ".[dev]"
       - name: Build website
         run: nbprocess_docs
       - name: Deploy to GitHub Pages