Don't pre-pull default image

Author: vbrown608

.github/workflows/ci.yml

@@ -9,8 +9,6 @@ jobs:
       - uses: actions/checkout@v2
       - name: Build Docker image
         run: docker build . --build-arg NF_IMAGE_VERSION=$GITHUB_SHA -t netlify/build:$GITHUB_SHA
-      - name: Pull Xenial
-        run: docker pull netlify/build:xenial
       - uses: vbrown608/whalescale@main
         with:
           token: ${{ secrets.GITHUB_TOKEN }}