Merge pull request #5 from theohbrothers/fix/ci-remove-unneeded-dockerhub-registry-user-in-prep-step-of-build-x-jobs

 Fix (ci): Remove unneeded `DOCKERHUB_REGISTRY_USER` in `prep` step of `build-*` jobs

Author: leojonathanoh

generate/templates/.github/workflows/ci-master-pr.yml.ps1

@@ -61,8 +61,6 @@ $VARIANTS | % {
 
     - name: Prepare
       id: prep
-      env:
-        DOCKERHUB_REGISTRY_USER: ${{ secrets.DOCKERHUB_REGISTRY_USER }}
       run: |
         set -e