[skip ci] Remove unused parts

.github/workflows/workflow.yaml

@@ -14,7 +14,6 @@ on:
 env:
   PROJECT_ID:          iris-community-demos
   SERVICE_ACCOUNT_KEY: ${{ secrets.SERVICE_ACCOUNT_KEY }}
-  GOOGLE_CREDENTIALS:  ${{ secrets.TF_SERVICE_ACCOUNT_KEY }}
   GITHUB_SHA:          ${{ github.sha }}
   GCR_LOCATION:        eu.gcr.io
   IMAGE_NAME:          dc-analytics-image
@@ -55,49 +54,10 @@ jobs:
       run: |
         docker push ${REGION}-docker.pkg.dev/${PROJECT_ID}/community/${IMAGE_NAME}:${GITHUB_SHA}
 
-  # gke-provisioner:
-  #   # Inspired by:
-  #   ## https://www.terraform.io/docs/github-actions/getting-started.html
-  #   ## https://github.com/hashicorp/terraform-github-actions
-  #   name: Provision GKE cluster
-  #   runs-on: ubuntu-20.04
-  #   steps:
-  #   - name: Checkout
-  #     uses: actions/checkout@v3
-
-  #   - name: Terraform init
-  #     uses: hashicorp/terraform-github-actions@master
-  #     with:
-  #       tf_actions_version: 0.12.17
-  #       tf_actions_subcommand: 'init'
-  #       tf_actions_working_dir: 'terraform'
-
-  #   - name: Terraform validate
-  #     uses: hashicorp/terraform-github-actions@master
-  #     with:
-  #       tf_actions_version: 0.12.17
-  #       tf_actions_subcommand: 'validate'
-  #       tf_actions_working_dir: 'terraform'
-
-  #   - name: Terraform plan
-  #     uses: hashicorp/terraform-github-actions@master
-  #     with:
-  #       tf_actions_version: 0.12.17
-  #       tf_actions_subcommand: 'plan'
-  #       tf_actions_working_dir: 'terraform'
-
-  #   - name: Terraform apply
-  #     uses: hashicorp/terraform-github-actions@master
-  #     with:
-  #       tf_actions_version: 0.12.17
-  #       tf_actions_subcommand: 'apply'
-  #       tf_actions_working_dir: 'terraform'
-
   kubernetes-deploy:
     name: Deploy Kubernetes manifests to GKE cluster
     needs:
     - gcloud-setup-and-build-and-publish-to-GCR
-    # - gke-provisioner
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout