Don't checkout submodules for deployment builds.

I'm told this is no longer necessary as the pipeline is using
a different solution.

Author: rillian

.github/workflows/generalized-deployments-reproducible.yaml

@@ -13,8 +13,6 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v2
-      with:
-        submodules: recursive
     - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v1
       with: